
【名词&注释】
分子式(molecular formula)、离子方程式(ionic birefringence equation)、卵细胞(egg cell)
[单选题]下列各组句子中加点词的意义和用法相同的一组是( )
A. 群为儿时 辟群为别驾
B. 以为模、逵秽德 廙深德群
C. 今东,必与之争 备遂东,与袁术战
D. 世以群为知人 将何以应敌
查看答案&解析
举一反三:
[单选题]下列离子方程式正确的是
A. 向盐酸中滴加氨水:H+ + OH- = H2O
B. Fe(OH)3溶于氢碘酸:Fe(OH)3 + 3H+ = Fe3+ + 3H2O
C. 铜溶于稀硝酸:3Cu + 8H+ + 2NO3- = 3Cu2+ + 2 NO ↑+ 4H2O
D. 向Na2S2O3溶液中通入足量氯气:S2O32-+2Cl2+3H2O=2SO32-+4Cl-+6H+
[单选题]
A. applying
B. asking
C. looking
D. working
[单选题]一个造孢细胞最终可产生( )个卵细胞。
A. 1
B. 2
C. 4
D. 8
[单选题]下列溶液中,同样能用于“捕捉”二氧化碳的是( )
A. KNO3溶液
B. CaCl2溶液
C. CuSO4溶液
D. Na2CO3溶液
[单选题]Whieh of the fotlowing plavs a role in making the islands “a pradise for wikllife”?
A. Animals on theis lands feed on grass.
B. Lood go mthent forbids killing wildlife.
C. Fccple nninot visit the islands as they wash.
D. fourists are not allowed to torch the animals.
[单选题]
A. elean
B. read
C. turn
D. count
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