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【单选题】
应用文最大、最本质的特点是:
A.
真实性
B.
实用性
C.
规范性
D.
针对性
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皮皮学刷刷变学霸
举一反三
【单选题】Great changes have taken place since then in the primary school _______I am studying.
A.
where
B.
that
C.
which
D.
there
【单选题】选择模式生物进行研究是生物学研究的一种捷径,下列哪个适合于做原核生物的模式生物?( )
A.
酵母
B.
秀丽线虫
C.
水螅
D.
大肠杆菌
【单选题】原核生物的哪一种DNA聚合酶还具有5’到3’外切酶活性
A.
DNA聚合酶Ⅰ
B.
DNA聚合酶Ⅱ
C.
DNA聚合酶Ⅲ
D.
DNA聚合酶Ⅳ
E.
以上都不是
【多选题】真核生物翻译和原核生物相比有哪些不同
A.
起始氨基酸一般不需要甲酰化修饰
B.
没有SD序列参与
C.
一条mRNA一般指导一种多肽链的合成
D.
形成多聚核糖体
【单选题】原核生物核糖体的 30S 小亚基中含有哪一种 rRNA
A.
23SrRNA
B.
18SrRN
C.
5SrRNA
D.
16SrRNA
【单选题】—How do you like China? —Great changes _______ since I _______ here 8 years ago.
A.
have taken place; came
B.
took place; have come
C.
took place; came
【单选题】Great changes ______ in China since1978.
A.
have been taken place
B.
had taken place
C.
have taken place
【单选题】Great changes ________ in the city since 1979.
A.
have taken place
B.
have taken the place
C.
have been taken place
D.
have been happened
【单选题】Great changes______ in the city since1970.
A.
have been taken place
B.
have taken place.
C.
has taken place
D.
took place
【单选题】支气管哮喘发病多属于
A.
I型变态反应
B.
Ⅱ型变态反应
C.
Ⅲ型变态反应
D.
变态反应
E.
V型变态反应
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