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【简答题】
病毒核酸存在的主要类型（）、（）、（）和（）4种。
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反馈参考答案：
举一反三
【单选题】What can we learn from Servals words in Paragraph 3?
A.
You will find it enjoyable to see a dentist.
B.
You should see your dentist on a day-to-day basis.
C.
You can brush with the Kolibree as if guided by a dentist.
D.
You'd like a dentist to watch you brush your teeth every day.
【单选题】执行下列程序后,f的值为_____ int f=5; switch(f) {case 5:f++; case 6: f+1; case 7:f*=3;break; case 8:++f; }
A.
15
B.
19
C.
21
D.
18
【单选题】I am sorry I can't see you immediately; but if you'd like to take a seat, I'll be with you ___ .
A.
for a moment
B.
in a moment
C.
for the moment
D.
at the moment
【单选题】I'm sorry I can't see you immediately; but if you'd like to take a seat, I'll be with you ___
A.
For moment
B.
In a moment
C.
For the moment
D.
At the moment
【单选题】I'm sorry I can't see you immediately; but if you'd like to take a seat, I'll be with you ___
A.
For a moment
B.
In a moment
C.
For the moment
D.
At the moment
【单选题】对这首诗歌描绘错误的是()
A.
这首诗描绘一幅清新的雨后天晴图。
B.
这首诗表达了人们热爱生活，热爱大自然的思想感情。
C.
这首诗歌中描写了泥路、小路、小草、小白菊等景物
D.
这首诗歌运用了排比，反问，拟人的修辞手法。
【简答题】If you'd like, we will be very happy to arrange a visit to our factory. Thanks a lot. If I could stay here for a few days, I'd be to see you at your factory.
【简答题】某转轴由一对代号为 30312 的圆锥滚子轴承支承,轴上斜齿轮的轴向分力 F x =5000N ,方向如图。已知两轴承处的径向支反力 F r1 =13600N , F r2 =22100N 。已知内部轴向力 , Y=1.7 。求轴承所受的轴向力 F a 。
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