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【简答题】
关于塑料管道,下列各项不正确的是( )。 A.PP—R管属可燃性材料,不能用于消防给水系统 B.PP—R管和PEX管在阳光的长期照射下易老化 C.PEX管用于地热采暖系统的分前的地热管需加避光护套 D.PP—R管和PEX管均可采用热熔连接
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举一反三
【单选题】下列说法正确的是
A.
阈值增大,说明细胞的兴奋性升高
B.
阈值减小,说明细胞的兴奋性下降
C.
阈值与兴奋性呈正变关系
D.
阈值与兴奋性呈反变关系
【单选题】社会主义核心价值观的基本内容包含( ) 个层面、( ) 个词,共 ( )个字。
A.
3 4 12
B.
3 12 24
C.
3 6 12
D.
3 6 18
【单选题】In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet. A(66)is basically an end point of a communication link betwe...
A.
program
B.
UDP
C.
socket
D.
TCP
【简答题】S1:Now let's check the number of lifebuoys,the condition of marking and retro-reflective tape.S2:All right,Sir.Q:Which of the following items not mentioned?A. The number of lifebuoys. B. The condition...
【简答题】●In the following essay,each blank has four choices.Choose the most suitable one from the four choices and write down in the answer sheet. A (66) is basically an end point of a communication link betw...
【判断题】疑问句的语调总是升调
A.
正确
B.
错误
【判断题】对人来说,幸福主要在于“我”个人的快乐或满足,而他人的幸福则与“我”无关。[ ]
A.
正确
B.
错误
【判断题】物体受到了很大的力的作用,说明这个物体有了很大的加速度
A.
正确
B.
错误
【简答题】S1:Now what's the next step?S2:Let's check the condition of the coaming as well as the watertightness including packing,cleats and tarpaulins.Q:What are they most probably checking?A. Air pipes. B. Co...
【简答题】青蛙的受精方式是______受精。
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