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【单选题】
二进制数00010001进行逻辑非运算结果是( )A.
11110000
B.
01010101
C.
10101010
D.
11101110
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【单选题】. The park is the library and the school. A．onB．underC．inD．between
A.
. The park is____the library and the school. A．on
B.
under
C.
in
D.
between
【简答题】C Yellowstone Weather Yellowstone National Park is at high altitude. Most of the park is above 7500 feet (2275 meters). Yellowstone’s weather is unpredictable. In summer, it may be warm and sunny with...
【单选题】The bank is in front of the park, so the park is _______the bank.
A.
from
B.
at
C.
behind
【简答题】Where is the park? The park is ____ of the town.
【简答题】完成句子。 1. Take a walk ______ (穿过) the park on First Avenue. Across from the park is the police station. 2. Are there any ______(树叶) under the tree? 3. Please look at the boy ______ (躺) on the grass. 4....
【单选题】下列各组分子中,中心原子均采取不等性 sp 3 杂化的是:
A.
PCl 3 、 NH 3
B.
BF 3 、 H 2 O
C.
CCl 4 、 H 2 S
D.
BeCl 2 、 BF 3
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