About 9:30 we went to the White House. It's【61】the public from ten【62】twelve, and there was a long line of people【63】to get in. We didn't have to wait very long, because the line moved pretty quickly.
The White House is really white. It【64】every year. And it seems very white, because it's got beautiful lawns【65】around it, with many trees and shrubs. The grounds【66】about four square blocks. I mean, they' re about two blocks long【67】each side.
Of course, we didn't see the whole building. The part【68】the president lives and works can not be visited by the public. But the part we saw was beautiful. We went through five of the main rooms. One of【69】was the library, on the ground floor. On the next floor, there are three rooms named【70】the colors that are used in them: the Red Room, the Blue Room, and the Green Room. The walls are covered with silk【71】There are【72】old furniture, from the time【73】the White House was【74】built. And everywhere there are paintings and statues of former presidents and【75】famous people from history.
(56)
A.made
B.took
C.did
D.set
第1题
双胎妊娠胎盘检查发现中隔为两层羊膜,受精卵的分裂发生于()
A.囊胚期
B.桑椹期前
C.羊膜囊形成后
D.原始胚盘形成后
E.受精后13天以上
第2题
双胎妊娠胎盘检查发现中隔为两层羊膜,受精卵的分裂发生于()。
A.囊胚期
B.桑椹期前
C.羊膜囊形成后
D.原始胚盘形成后
E.受精后l3天以上
第3题
双胎妊娠胎盘检查发现两个羊膜囊的中隔为2层,受精卵的分裂发生于
A.囊胚期
B.桑椹期前
C.羊膜囊形成后
D.原始胚盘形成后
E.受精后13天以上
第5题
单卵双胎中受精卵分裂发生在桑椹期,则()
A.两胎囊之间的中隔由两层羊膜、两层绒毛膜组成
B.两胎囊之间的中隔由两层羊膜组成
C.两胎囊之间的中隔为一层羊膜和一层绒毛膜
D.可发生胎内胎
E.两胎儿共存于一个羊膜腔内
第6题
单卵双胎时,受精卵分裂极少发生在
A.桑椹期
B.晚期囊胚
C.羊膜囊形成后
D.原始胚盘形成后
E.以上都不是
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