学习了《中华大地的远古人类》一课后,同学们对北京人过群居生活的主要原因进行了探究

题型:选择题

问题:

学习了《中华大地的远古人类》一课后,同学们对北京人过群居生活的主要原因进行了探究,你认为结论正确的的是哪一项[ ]

A.为了共同劳动,分享劳动成果

B.智力低下

C.喜欢过群居生活

D.生活环境险恶,工具简陋,只靠个人力量难以生存

考点:北京人
题型:选择题

根据短文内容,完成下面各题,每空词数不限(每题一分,共5分)。

My English teacher is Mary. She is from England. Her father is Nick and her mother is Rose. They are very old. So they don’t work now. Mary has two children, a son and a daughter. Her daughter is Betty. Her son is John. Mary and her daughter are in China, but her husband Paul Smith is in England. Her son is in America. Paul is a police officer. John is a college student. Betty and I are in the same school. We are classmates. We are in Class Three, Grade Seven.

小题1:Betty is Mary’s         .

小题2: Betty’s father is a                (职业).

小题3:        teaches the writer(作者) English.

小题4:Mary comes from         .

小题5:Nick and Rose are Mary’s         .

题型:选择题

某学生远视力检查结果为4.5,作雾视后远视力提高至4.7,应初步诊断为()。

A.真性近视

B.真假混合性近视

C.假性近视

D.视力低下

E.近视状态

题型:选择题

简述JFT121型晶体管调节器的工作过程。

题型:选择题

机体对胞内菌的感染,以何种免疫为主要防御手段()

A.细胞免疫 

B.体液免疫 

C.天然主动免疫 

D.人工被动免疫 

E.非特异性免疫

题型:选择题

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