74. Which of the following statements is (are) positive feedback?
(A) The hormones stimulate uterus contraction when child-birth occurs in mammals.
(B) A nursing infant's sucking increases the secretion of a milk-releasing hormone in the mother.
(C) An increase in calcium concentration increases the secretion of a hormone that stores calcium in bone.
(D) Both A and B.
(E) All of A, B, and C.

70. Which of the following statements about immunoglobulin is FALSE? (A) IgG is the most abundant immunoglobulin in serum. (B) IgM can activate classical complement pathway. (C) IgE can induce mast cell degranulation. (D) IgG is the first immunoglobulin class produced in a primary response to an antigen. (E) IgA is the predominant immunoglobulin class in external secretions such as breast milk, saliva and tears.

71. One of the typical ratios resulting from epistatic interactions in dihybrid crosses would be (A) 9:3:3:1 (B) 1:1:1:1 (C) 9:3:4 (D) 1:2:1 (E) 3:1

72. In the absence of recombination, what ratio of phenotypes is expected in the progeny of the cross aB/Ab x AB/ab? (A) 3 A-B- : 1 aabb (B) 1 aaB- : 2 A-B- : 1A-bb(C) 9 A-B- : 3 A-bb : 3 aaB- : 1 aabb (D) 1 A-B- : 1 A-bb : 1 aaB- : 1 aabb (E) 1 aB : 1 Ab : 1 AB : 1 ab

73. Diabetes insipidus is a disorder marked by production of abnormally large in volume and very dilute urine. It can cause severe dehydration. The mechanism(s) attributing the disorder can be (A) mutations that prevent ADH production (B) mutations that inactivate aquaporin (C) mutations that inactivate insulin receptor (D) both A and B (E) all of the A, B, and C

75. The beginning of a new menstrual cycle is initiated by the production and release of _________, which occurs when inhibition by _______ ceases. (A) FSH and LH; GnRH (B) GnRH; FSH and LH (C) estrogen and progesterone; GnRH (D) GnRH; estrogen and progesterone (E) FSH and LH; estrogen and progesterone

1. 蒸汽脫蠟爐以試劑測試鍋爐水質呈現(A)橙色(B)黃色(C)紅色(D)藍色 為正常。

2. 下列何者不屬於氣壓調整組合(三點組合)(A)過濾器(B)減壓閥(C)潤滑器(D)增壓閥。

3. １馬力之電動馬達連續使用 10 小時所耗電量為(A)75W(B)746W(C)7460W(D)74600W。

4. 工廠一般之顏色標誌，下列敘述何者錯誤(A)顏色標示無意義(B)黃色視覺較佳，表示警告(C)綠色表示安全(D)紅 色表示危險。

5. 所謂一度電係指(A)1 焦耳/秒(B)1 瓦-秒(C)1kw/秒(D)1kw/小時。