将等质量的铜片在酒精灯上加热后,分别插入下列溶液中,铜片质量增加的是( ) A.

题型:选择题

问题:

将等质量的铜片在酒精灯上加热后,分别插入下列溶液中,铜片质量增加的是(  )

A.硝酸

B.稀盐酸

C.Ca(OH)2溶液

D.乙醇

考点:醇的通性乙醇
题型:选择题
关于打点计时器,下列说法正确的是(  )

A.打点计时器可以用干电池做电源来工作

B.电磁打点计时器可以直接使用220v的交流电

C.使用打点计时器时,一般不用固定

D.打点计时器如果使用频率为50Hz的交流电源工作,则打点周期为0.02s

题型:选择题

血栓闭塞性脉管炎的临床表现包括患肢()

A.皮温降低,色泽苍白

B.感觉异常、疼痛

C.营养障碍改变

D.远侧动脉搏动感弱或者消失

题型:选择题

Several years ago, Simon Ma, CFA, founded an investment club with three friends. The investment club’s account grew rapidly to a substantial size, but the club has not actively traded the account for at least a year and does not plan to resume active trading of the account. Simon’s employer requires an annual disclosure of employee stock ownership. Simon discloses all of his personal trading accounts., but does not disclose his holdings in the investment club. Has Simon most likely violated any CFA Institute Standards of Professional Conduct()

A. No 

B. Yes, with respect to fiduciary duty.

C. Yes, with respect to confilicts of interest.

题型:选择题

筒式干燥设备蒸汽压力变送器有故障时,要检查输出信号和()是否相符,如不符合进一步检查有无零点漂移现象。

题型:选择题

采用全野外数字测图进行1:500地形图测绘时,每平方千米图根点个数最少不低于()个。

A.50

B.64

C.100

D.150

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