题目内容

按照结构划分,PLC可分为:

A. 整体式
B. 模块式
C. 叠装式
D. 组合式

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PLC主要由:、、、组成。

A. CPU
B. 输入模块
C. 输出模块
D. 编程装置

与转氨作用有关的维生素是

A. 维生素B1
B. 维生素B2
C. 维生素PP
D. 维生素B6

Tom arrived for work _____ that the manager sent him home again.

A. too late
B. very late
C. so late
D. much later

Mrs Brown says she won't pay $20 for the dress; it's not worth _______.

A. all that much
B. that all much
C. that much all
D. much all that