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【单选题】
关于磷脂,不正确的描述是
A.
膜脂以磷脂为主
B.
膜上的磷脂主要是磷酸甘油脂
C.
不同类的磷脂性质不同
D.
磷脂为两性分子 , 每一个分子疏水的极性头和亲水的脂肪酸链所组成
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【简答题】Fill in the blanks with the words given below. Change the form where necessary. concerning representative advertise consider wade through operation employment li...
【单选题】关于主操纵系统工作过程的描述正确的是:
A.
驾驶员通过中央操纵机构发出操纵指令,由传动机构将其传到舵面
B.
驾驶员操纵中央操纵机构直接驱动舵面
C.
驾驶员通过控制电门发出操纵指令,由传动系统将其传到舵面
D.
驾驶员通过配平手轮发出操纵指令,由传动系统将其传到舵面
【单选题】Blue jeans are probably the single most representative article of American clothing.They were originally 26 by Jacob Davis,a tailor from Nevada, 27 ,together with dry-goods sales man Levi Strauss,pate...
A.
invented
B.
introduced
C.
developed
D.
delivered
【单选题】以下哪项不属于物理性致癌因素?
A.
红外线
B.
紫外线
C.
X射线
D.
E.
放射性同位素
【简答题】Task 2 Directions: The following is a poster. After reading it, you will find 3 questions or unfinished statements, numbered 45 to 47. For each question or statement, there are 4 choices marked A), B)...
【单选题】A 57-year-old woman has had increasing abdominal enlargement for 6 months. During the past 2 days, she developed a high fever. On physical examination, her temperature is 38.5° C. The abdomen is enlar...
A.
α1-Antitrypsin deficiency
B.
Chronic alcohol abuse
C.
Hepatitis E viral infection
D.
Hereditary hemochromatosis
E.
Primary sclerosing cholangitis
【简答题】The Chinese Company Adapting to the Islamic Culture and Customs Company H is a large company and its products are among the best of the same line in China. They have already extended their business in...
【单选题】国外研究人员发现,叶酸可引发癌细胞凋亡,对癌细胞的基因表达有一定影响,故属于一种天然抗癌维生素。 以下哪项如果为真,最能反驳以上观点?( )
A.
叶酸在一定程度上对癌细胞基因表达有促进作用
B.
叶酸和维生素C一起使用,能够加速癌细胞的再生
C.
癌症病人叶酸服用过多会导致许多并发症
D.
叶酸不易被人体吸收
【单选题】实际GDP是通过( )得到的。
A.
当期产量乘以GDP平减指数
B.
当期产量除以GDP平减指数
C.
当期 产量 乘以基期价格
D.
当期 产量 除以基期价格
【单选题】实际 GDP是通过( )得到的。a.当期GDP乘以GDP缩减指数; b.当期GDP除以GDP缩减指数;c.当期GDP乘以基期价格; d.当期GDP除以基期价格。
A.
b
B.
b
C.
c
D.
d
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