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【单选题】
听力原文： Algerian police, looking for three kidnapped French nationals, are searching vehicles at roadblocks in downtown Algiers. The van used in Sunday's kidnapping was found abandoned in the area. An Algerian police chief says the captives may still be alive Seven foreigners have been killed over the last month by suspected Moslem extremists fighting to topple the government. France is urging families of French nationals in Algeria to come home. The kidnapping took place ______.A.
on Sunday
B.
last month
C.
when the van was found
D.
before seven foreigners were killed
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【简答题】合成香料的原料来源?具体原料?
【多选题】蓄电池测试仪MCR341
A.
MCR341能够准确判定一个亏电电池是该更换还是只需要充电
B.
确保所有的车辆附加载荷均已关闭，并且点火处于关闭位置
C.
最好的测试位置是在蓄电池的端子上。如果蓄电池不容易接近，你可以在跨接线柱上测试。但是，现有的能量值可能低于实际值。
D.
当用MCR341进行检测时，为保证测量能够顺利进行，必须保证蓄电池电压高于6V.
【简答题】视错觉是普遍存在的现象，其主要类型有（ ）。