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【单选题】
液体沸腾的必要条件，一是要有气化核心，二是要________。A.
液体过热
B.
清洁壁面
C.
降低表面张力
D.
降低压力
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举一反三
【单选题】— ______ have you learned to play the piano? — For five years. [ ]
A.
How far
B.
How often
C.
How long
D.
How soon
【单选题】_______ is the distance from the mount to the river? [ ]
A.
How far
B.
how soon
C.
how often
D.
how long
【单选题】-________have you visited the Great Wall? -Once. [ ]
A.
How many times
B.
How often
C.
How soon
D.
How long
【单选题】---How amazing the noodle is! ---Yes, it is ________, and breaks the Guinness World Record as the longest handmade noodle.
A.
1704-meter-long
B.
1704-meters-long
C.
1704 meter long
D.
1704 meters long
【单选题】阅读下列程序，则运行结果为 #include 'stdio.h' fun() { staic int x=5； x++； return x；} main() { int i，x； for(i=0；i＜3；i++) x=fun()； printf('%d/n'，x)；}
A.
5
B.
6
C.
7
D.
8
【简答题】阅读下列程序: #include int main( ) { float x; x=1.0/2+1.0/4; printf(“\nx=%f\n”,x); return 0; } (1) 程序的运行结果是: 。 (2) 如果代码中相应的表达式改为 x=1/2+1/4 ,则运行结果是 。
【单选题】The scientists are not sure__________ 查看材料
A.
how long the ice age lasted
B.
where ice sheets melted during the ice age
C.
what caused the temperature changes
D.
what the earth is made up of
【单选题】—______ have you studied English? —Not long, just for a month. [ ]
A.
How soon
B.
How many
C.
How long
D.
How
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