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【简答题】
中国抗日战争的起点是（ ）。
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反馈参考答案：
举一反三
【简答题】不同代谢途径可以通过交叉点代谢中间物进行转化，在糖、脂、蛋白质及核酸的相互转化过程中三个最关键的代谢中间物是______、______和______。
【单选题】How can we get rid of garbage? Do we have enough energy sources to meet our future energy needs? These are two important questions that many people are asking today. Some people think that man might b...
A.
The shortage of energy and air pollution.
B.
The shortage of energy and the shortage of empty land for holding garbage.
C.
Air pollution and the shortage of empty land for holding garbage.
D.
Air pollution and the shortage of fossil fuel.
【单选题】—______ can we get the photos? —In two days.
A.
How long
B.
How often
C.
How much
D.
How soon
【单选题】How can we get rid of garbage? Do we have enough energy sources to meet our future energy needs? These are two important questions that many people are asking today. Some people think that man might b...
A.
The shortage of energy and air pollution.
B.
The shortage of energy and the shortage of empty land for holding garbage.
C.
Air pollution and the shortage of empty land for holding garbage.
D.
Air pollution and the shortage of fossil fuel.
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