题目内容

若砂土的天然孔隙比等于最大孔隙比,则相对密度为1 正确 错误

A. 对
B. 错

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Lisen to dialogue 1 and fill in the blanks(one word for each blank and the first letter is given for each word). (填写完整单词,答案不要打空格) Ben is going to find a Chinese partner to set up a joint (1) v_____. Lin Xi, as a long-term partner, is intertested in this plan. In order to (2) c___ in on China's vast market (3) p_____ and low (4) l_____ cost, Ben wants a Chinese factory to join hands with them in producing (5) d_____ cameras in China and will share the technical (6) k_______ and the essential equipment. A total value of 5-million-dollar investment is planned for a joint company of a (7) m_______ size. Ben will lay out 55% of the total (8) i______, including cash, machinery and (9) e________. If Lin Xi joins in, she will have the right to (10) s_______ the quality and (11) p_____ of the products. The price of the products will be (12) s____ according to the price in the (13) i_______ market which will bring (14) p_____ to both. Finally, Ben and Lin Xi agree to (15) e______ in a joint company with each other.

下列不属于控制器基本功能的是

A. PID运算功能
B. 偏差显示功能
C. 输出显示功能
D. 检测功能

DDZ-Ⅲ型控制器的输出信号为

A. 4-20mA
B. 0-10mA
C. 1-5V DC
D. 10-50A DC

阀位表指示的是

A. 控制器输出信号的大小
B. 偏差的大小
C. 控制器的正、反作用
D. 给定值的输入方式

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