試題詳解

3. Red tides are dangerous because of ________.
(A) the dinoflagellates that cause them produce a strong neurotoxin
(B) the euglenoids that cause them produce a toxin that causes severe flulike symptoms
(C) the green algae that cause them produce a severe allergic reaction in most people
(D) the diatoms that cause them produce severe gastric distress
(E) the red algae that cause them can disrupt shipping by clogging propellers