二进制数10001000B转化成的十六进制数为_____。
A. 88H
B. 88
C. 136H
D. 136
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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
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