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Canada is a very large country. It is bigger than China. China is the third largest country in the world. Canada is the second largest . It has an area of nearly 10 million. Canada has a very long coastline. To the west is the Pacific Ocean. To the east is the Atlantic Ocean. The Arctic Ocean is in the north. There are many islands off the Pacific coast and off the Arctic coast. The biggest one in the west is Vancouver Island. In the east there is New Foundland, and in the Arctic Ocean the biggest islands are Baffin Island and Victoria Island.(Greenland is not part of Canada. It is a part of Denmark, a country in northern Europe.) Canada has a long border with the USA in the south. In the northwest Canada borders on the American “State of Alaska”. Canada is a northern country. The Arctic Circle (Latitude 16°N) passes through the northern part . in the south, half of the border with the USA follows line of latitude 49°N 小题1:Which of the following statements is true? A.USA is the second largest country in the world. B.Canada has nearly 10 million sq. km. So it is the second largest country on the world. C.China is as large as Canada and the secong largest country in the world. D.Russia is the second largest country in the world. 小题2:What ocean is in the north of Canada? A.The Pacific Ocean B.The Atlantic Ocean C.The Indian Ocean D.The Arctic Ocean 小题3:There are many islands in Canada, and Vancouver Island is_______. A.in the west B.in the east C.in the north D.in the south 小题4:Alaska is one of the states of America. It is on the___ of Cananda. A.northeast B.southeast C.northwest D.southwest
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举一反三
【多选题】下列关于退火温度说法正确的是( )
A.
合适的退火温度应低于引物Tm值5℃左右
B.
引物与模板的退火温度一般在45-55℃之间
C.
在Tm值允许的范围内,选择偏低的退火温度可以提高PCR反应的特异性
D.
退火时间至少需要一分钟
【判断题】在Word2000中,可以将文档打印到文件。( )
A.
正确
B.
错误
【单选题】游离蒽醌衍生物酸性最弱的是
A.
含COOH者
B.
含2个以上β-OH者
C.
含1个β-OH者
D.
含2个以上α-OH者
E.
含1个α-OH者
【单选题】游离蒽醌衍生物酸性最弱的是
A.
含COOH者
B.
含2个以上β -OH 者
C.
含一个β -OH
D.
含2个以上α -OH 者
E.
含一个α -OH
【单选题】在word2000中,存储文件时若输入的文件名与当前目录下的文件同名,按Enter(或保存)按钮后则____。
A.
直接覆盖原文件
B.
提示冲突信息,请求更名
C.
与原文件合并
D.
放弃当前文件
【单选题】用分层总和法计算一般土地基最终沉降量时,用附加应力与自重应力之比确定压缩层深度,一般其值应小于或等于( )。
A.
0.2
B.
0.1
C.
0.5
D.
0.4
【多选题】域名设计的技巧主要有( )。
A.
尽可能与企业名称相一致
B.
尽可能与企业的商标相一致
C.
尽量控制在8个字符以内
D.
多重注册
【简答题】小张暑假回家,他的亲友们问他在大学学什么。他回答说,心理学。他的亲友们一脸惊诧,“那你岂不是知道我们心里在想什么?”小张的亲友们关于心理学的认识对吗?
【单选题】分层总和法计算地基最终沉降量时,自重应力应从( )算起。
A.
天然地面
B.
室内地面
C.
基底
D.
地下水位
【单选题】游离蒽醌衍生物酸性最弱的是
A.
含一COOH者
B.
含2个以上α-OH者
C.
含1个β-OH者
D.
含2个以上β-OH者
E.
含1个α-OH者
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