题目内容

S7-200系列PLC比较指令中，字符”<>“表示（）

A. 等于
B. 不等于
C. 大于
D. 小于

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1.猫吃耗子是因为耗子中含有猫自身所不能合成的（）

A. 对乙酰氨基酚
B. 氨基酸
C. 枸橼酸
D. 牛磺酸

She lived there before he ____ to China.

A. came
B. comes
C. come
D. coming

I____ my homework at 7:00 yesterday evening.

A. finished
B. would finish
C. was finishing
D. finish

The last time I Jane she _ cotton in the fields.

A. had seen, was picking
B. saw, picked
C. had seen, picked
D. saw, was picking