2.假如你在研究中发现一种新的单细胞生物并鉴定该生物的分类,则以下何种特性与你的鉴定有关 ( )
①核膜的有无 ②核糖体的有无 ③细胞壁的有无 ④膜上磷脂的有无
A.①③ B.②④ C.①④ D.②③
解析:检测有无核膜可以判断该细胞属于原核细胞还是真核细胞。检测有无细胞壁,
可以判断该细胞是动物细胞还是植物细胞或原核细胞。
答案:A
1.细胞是生命系统最基本的结构层次,“每一个生物科学问题的答案都必须在细胞中寻找”。下列有关说法正确的是 ( )
A.神经细胞中的水和蛋白质分子属于生命系统的结构层次
B.池塘中的水、阳光等环境因素属于生命系统
C.细胞学说使人们对生命的认识由细胞水平进入到分子水平
D.细胞学说的创立过程完全由施莱登和施旺两人完成
解析:细胞是生命系统中最基本的结构层次,分子、原子等不属于生命系统的结构层次。生态系统是生命系统的结构层次,生态系统包括生物因素和非生物因素。细胞学说使人们对生命的认识进入到细胞水平。细胞学说是施莱登和施旺在总结前人的成果的基础上结合自己的研究得出的。
答案:B
15.Houses in this district are not at all as expensive as expected. they're the cheapest in the suburb area.
A.Eventually B.Actually
C.Gradually D.Especially
解析:actually相当于in fact,事实上,实际上。eventually终于,最后;gradually渐渐地,逐渐地;especially特别地。
答案:B
14.He commanded that his troops .
A.attacked B.should be attacked
C.would be attacked D.attack
解析:command“命令”,后接宾语从句用(should)do,选D。
答案:D
13.He made another wonderful discovery, very important to science.
A.which I think is B.which I think it is
C.which I think it D.I think which is
解析:句中I think是插入语,which引导非限制性定语从句。
答案:A
12.It is so nice to hear from her. ,we last met more than thirty years ago.
A.What's more B.That is to say
C.In other words D.Believe it or not
解析:句意:收到她的来信太好了,信不信由你,我们上次见面还是30多年前。What's more.另外,此外;That is to say.也就是说;In other words.换句话说;Believe it or not.信不信由你。
答案:D
11.-What do you think of the Chinese language today?
-Quite popular.It communicating with other countries.More and more foreign friends are learning Chinese now.
A.plays an important role in
B.gets along well with
C.is based on
D.is made use of
解析:考查动词短语。句意:它在和其他国家的交流上起很重要的作用。由句意可知A项正确。
答案:A
10.My school is more than ten away from my home,so I have to go to school by bike.
A.blocks B.houses
C.streets D.roads
解析:考查名词词义。句意:学校离我家有十多个街区远,因此我不得不骑自行车去上学。由句意可知A项正确。
答案:A
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