50______

【名词&注释】

太阳辐射(solar radiation)、方程式、对流层(troposphere)、碳酸氢镁(magnesium bicarbonate)、次氯酸钙溶液

[单选题]50______

A. passed
B. rashed
C. turned
D. continued

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学习资料：

[单选题]

A. book
B. article
C. will
D. contract

[单选题]能正确表示下列反应的例子方程式是

A. 向次氯酸钙溶液通入过量CO2：Ca2++2ClO-+CO2+H2O =CaCO3↓+2HClO
B. 向次氯酸钙溶液通入SO2：Ca2++2ClO-+SO2+H2O= CaSO3↓+2HClO
C. 氢氧化钙溶液与碳酸氢镁溶液反应：HCO3-+Ca2++OH-＝CaCO3↓+H2O
D. 在氯化亚铁溶液中加入稀硝酸：3Fe2++4H++NO3-=3Fe3++NO↑+2H2O

[单选题]

A. again
B. already
C. only
D. also

[单选题]What relation is the woman to Mr.Cooper?

A. His wife.
B. His boss.
C. His secretary.

[单选题]形成图示趋势的主要影响因素是

A. 获得太阳辐射多少
B. 距冬季风源地远近
C. 下垫面性质的差异
D. 对流层厚度的不同

[单选题]45________

A. drive
B. walk
C. follow
D. march

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