容积在3.125m3以内的液NH3贮罐属于（）类压力容器。 A.2 B.3 C.1_爱下问搜题

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问题单项选择题

容积在3.125m³以内的液NH3贮罐属于（）类压力容器。

A.2

B.3

C.1

D.常压

答案

参考答案：A

单项选择题

用汇编语言或高级语言编写的程序称为

A．用户程序

B．源程序

C．系统程序

D．汇编程序

选择题

We thought there were 35 students in the dining hall, ______, in fact, there were 40.

A. while
B. whether
C. what
D. which