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【多选题】
下列说法中正确的是（ ）A.
SO 2 和O 3 、PO 4 3— 和C1O 4 — 互为等电子体
B.
甲烷分子失去一个H + ，形成CH 3 — ，其碳原子的杂化类型发生了改变
C.
CH 4 、BCl 3 、CO 2 都是含有极性键的非极性分子
D.
所有元素的基态原子核外电子排布都遵循构造原理
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【简答题】When comparing two firms, an yst shouldmost appropriately adjust the financial statements when they include significant: A. acquisition goodwill, if one of the firms reports under IFRS and the oth...
【单选题】156 When comparing the cost of competing projects, which of the following is typically NOT considered?
A.
Opportunity costs.
B.
Direct costs.
C.
Sunk costs.
D.
Indirect costs.
E.
Burden rates
【单选题】When comparing the new lifestyle. with the old one, the author seems to assume a tone of ______.
A.
admiration for the new lifestyle
B.
regret for the loss of the old lifestyle
C.
a contempt for the new lifestyle
D.
appreciation for both lifestyles
【单选题】Comparing the time scales between many flu epidemics, scientists can ______ when another one might happen.
A.
determine
B.
anticipate
C.
predict
D.
assure
【多选题】When comparing and contrasting the similarities and differences between bridges and switches, which of the following are valid statements? Choose all the valid answer choices)
A.
Bridges are faster than switches because they have fewer ports.
B.
A switch is a multiport bridge,
C.
Bridges and switches learn MAC addresses by examining the source MAC address of each frame. received.
D.
A bridge will forward a broadcast but a switch will not.
E.
Bridges and switches increase the size of a collision domain.
F.
None of the above statements are true.
【简答题】两个弹簧振子的周期都是0.4s,设第一个振子从平衡位置向负方向运动,经过0.5s后,第二个振子才从正方向的端点开始运动,则这两振动相位差为 。
【简答题】两个弹簧振子的周期都是0.4s，设开始时第一个振子从平衡位置向负方向运动，经过0.5s后，第二个振子才从正方向的端点开始运动，则这两振动的相位差为（）。
【单选题】When comparing the air with 50% of relative humidity with the air with 100% of relative humidity, which one will hold more water?
A.
the former
B.
the latter
C.
not for sure
D.
same each other
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