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【单选题】
下列有关连接反应的叙述,错误的是
A.
连接反应的最佳温度为 37 ℃
B.
连接反应缓冲体系的甘油浓度应低于 10%
C.
连接反应缓冲体系的 ATP 浓度不能高于 1mM
D.
连接酶通常应过量 2-5 倍
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【多选题】Friendship flowers are flouring along the Belt and Road, do you think there exist similarities between personal friendships and international friendships?
A.
Yes. For instance, to deal well with whatever personal friendships or international friendships, there should exist sincerity, respect, and principles to follow.
B.
Yes. Both personal friendships international friendships tend to concern more about personal feelings or emotions or mutual interests.
C.
No, some differences as well. Compared with personal friendships, international friendships put emphasis more on profits.
D.
Yes. Personal friendships and international friendships can be eternal.
E.
Yes. For instance, to deal well with whatever personal friendships or international friendships, forgiveness is of great importance.
F.
Yes, some similarities. There exist competition between both personal friendships and international friendships .
【单选题】常用的 DNS 测试命令是( )
A.
ping
B.
net
C.
nslookup
D.
arp
【多选题】确定近因的基本方法有
A.
从最初事件出发,按逻辑推理直到最终损失发生,最初事件就是最后一个事件的近因
B.
从最初事件出发,按逻辑推理直到最终损失发生,倒数第二个事件就是最后一个事件的近因
C.
从损失开始,自后往前推,追溯到最初事件,如没有中断,最初事件就是近因
D.
从损失开始,自后往前推,追溯到最初事件,最后的事件就是近因
【多选题】根据表格中的数据,下列说法正确的是(  ) 物质 铝 铁 铜 水 煤油 密度/(kg?m 3 ) 2.7×10 3 7.9×10 3 8.9×10 3 1.0×10 3 0.8×10 3 比热容/[J(kg?℃)] 0.88×103 0.46×103 0.39×103 4.2×103 2.1×103 长1m、横截面积1mm 2 的导线在20℃时的电阻值/Ω 0.027 0.096 0.017 / ...
A.
用同样的酒精灯给质量相等、初温相同的水和煤油加热相同的时间后,发现水中的温度计示数较高
B.
装有煤油和水的两个容器底部受到的液体压强与液体深度的关系可用图象表示,其中图线b表示的是煤油
C.
将质量相等的铜块和铝块分别拉成粗细相同的铜线和铝线,将它们并联接入电路中,则通过铜线的电流较大
D.
用力分别匀速提升体积相同的铁块和铝块,提升的高度之比为3∶2,所用的时间之比为5∶9,则两次拉力的功率之比为79∶10
【单选题】Who was the woman in the gallery?
A.
A mental patient, whom the man probably knew.
B.
A stranger, whom the man had never seen before.
C.
Eterna, who was probably the man's girlfriend once.
D.
A mysterious figure, whose identity is not disclosed.
【单选题】That player is eterna11y arguing with the referee
A.
desperately
B.
constantly
C.
eventually
D.
extensively
【简答题】Passage 3 We buy books, and then they wait for us to read them. Days, months, even years. Books are _1_. That’s OK for books, but not for new authors. If people don’t read their first books,they’ll ne...
【单选题】常用的DNS测试的命令是()。
A.
Nslookup
B.
Hosts
C.
Debug
D.
trace
【单选题】常用的DNS测试的命令是( )。
A.
hosts
B.
nslookup
C.
debug
D.
trace
【多选题】确定近因的基本方法有
A.
从最初事件出发,按逻辑推理直到最终损失发生,最初事件就是最后一个事件的近因
B.
从损失开始,自后往前推,追溯到最初事件,如没有中断,最初事件就是近因
C.
从最初事件出发,按逻辑推理直到最终损失发生,倒数第二个事件就是最后一个事件的近因
D.
从损失开始,自后往前推,追溯到最初事件,最后的事件就是近因
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