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【判断题】
空胶囊常用规格有 8 种,常用的为 0~5 号 ,随号数由小到大,容积由大到小。 ( )A.
正确
B.
错误
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【简答题】Tom, an 11-year-old boy, was ill. He had got a cough, and his mother was worried and took him to see a doctor. The doctor looked over Tom carefully and said, “Tom, nothing serious.” Then he gave him s...
【单选题】He was then 14 years old, a rather late age ________ to start a formal education.
A.
to which
B.
at which
C.
in which
D.
with which
【简答题】Listen to the recording and complete the following sentences. 1 The ___1___ will be fine for the next ___2___ days. Then, on ___3___, ___4___ 'll be some rain in the ___5___. The ___6___ will be dry a...
【简答题】He was then 14 years old, a rather late age ____________ to start a formal education.
【简答题】(1)李煜的《虞美人》一词中用比喻、夸张、设问手法写出愁思的繁多与深广的句子是:“ ? 。” (2) 崔护《题都城南庄》中的“人面不知何处去,桃花依旧笑春风”写出了桃花依旧但不见人面的物是人非之感;李煜《虞美人》中的“ , ”也写出了这样的感受,由此勾起作者无穷的伤感之情。 (3) “明月”与“东风”是古诗词中常用的意象,李煜《虞美人》一词中也用到了这两个意象的句子是:“ , 。” (4) 李...
【多选题】关于受激辐射，下列说法正确的有：
A.
通过受激辐射产生的光子具有相同的状态
B.
粒子在两能级间跃迁发生受激辐射的速率与上能级的粒子数呈正比
C.
受激辐射与受激吸收是相反的物理过程
D.
普通光源里不存在受激辐射
E.
激光光源里不存在自发辐射，只存在受激辐射
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