74. The method used by Wadati to determine the depths of earthquakes is most like which of the following?
(A) Determining the depth of a well by dropping stones into the well and timing how long they take to reach the bottom
(B) Determining the height of a mountain by measuring the shadow it casts at different times of the day
(C) Determining the distance from a thunderstorm by timing the interval between the flash of a lightning bolt and the thunder it produces
(D) Determining the distance between two points by counting the number of paces it takes to cover the distance and measuring a single pace

70. According to the passage, which of the following statements is NOT true? (A) Computer consultants warn users not to plug unknown devices into our computers (B) Western businessmen do not buy cell phones and laptops made in China (C) No firewalls are powerful enough to withstand all hackers (D) More and more personal information online have been stolen every year

71. Based on the passage, what in future is NOT predicted? (A) Almost five times more of such internet of things will be produced by 2015 (B) Cars will be driven without drivers (C) Home appliances can be remote controlled from your office (D) Medical devices can be monitored by doctors far away

72. What is most likely the topic of the paragraph following this one? (A) How Google decided its next investment (B) The hope of wireless technology (C) The security of the Internet of things (D) The miracle of smart thermostats

73. The passage is primarily concerned with________. (A) demonstrating why the methods of early seismologists were flawed (B) arguing that deep events are poorly understood and deserve further study (C) defending a revolutionary theory about the causes of earthquakes and methods of predicting them (D) discussing evidence for the existence of deep events and the conditions that allow them to occur.

75. The passage supports which of the following statements about the relationship between the epicenter and the focus of an earthquake? (A) P waves originate at the focus and S waves originate at the epicenter. (B) In deep events the epicenter and the focus are reversed. (C) In shallow events the epicenter and the focus coincide. (D) In both deep and shallow events the focus lies beneath the epicenter.

76. The passage suggests which of the following about the views held by researchers before 1927? (A) Some researchers did not believe that deep events could actually occur. (B) Many researchers rejected the use of P-S intervals for determining the depths of earthquakes. (C) Some researchers doubted that the mantle was too ductile to store the stress needed for an earthquake. (D) Few researchers accepted the current model of how shallow events occur.

77. Which of the following best describes the organization of the first paragraph? (A) A suggestion is made and arguments in its favor are provided. (B) A criticism is levied and an alternative proposal is suggested. (C) A generalization is advanced and supporting evidence is provided. (D) An example is analyzed and general conclusions are derived from it.

78. According to the passage, the use of Antarctic krill as a food is an innovation whose future is________. (A) basically gloomy but still uncertain (B) somewhat promising but very tentative (C) generally bright and virtually assured (D) tied to the success of opaque-2 maize

79. It can be inferred from the passage that the author would be most likely to agree with which of the following statements concerning the solution to food shortages in developing countries? (A) The introduction of technological innovations to reap profits might alleviate food shortages to some degree, but any permanent solution can come only from effective governmental intervention in the socioeconomic system. (B) Long-lasting solutions will not be found until large landowners adopt improvements that will make production more efficient and thus more profitable. (C) In order to achieve a meaningful solution to the problem of food shortages, the tastes of the general population must be educated to accept the new food products of modern agricultural technology. (D) Although a short-term solution to food shortages can be achieved by importing food from other countries, a long-term solution requires a restructuring of the countries’ socioeconomic system.

80. The author provides a sustained argument to support which of the following assertions? (A) Profitability is neither necessary nor sufficient for a new technology to be adopted. (B) Profitability is the key factor guiding technological change. (C) Economic factors and governmental policies strongly influence the ultimate success of any innovation. (D) Opaque-2 maize is of limited benefit to poor families in developing countries.