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【单选题】
关于T细胞功能描述不正确的是A.
Th1可分泌细胞因子促进细胞免疫应答
B.
Th2分泌细胞因子促进B细胞的激活及体液免疫应答
C.
CTL发挥细胞毒性通过分泌穿孔素、颗粒酶及Fas/FasL促进细胞凋亡
D.
调节性T细胞主要发挥促进免疫应答作用
E.
Th17细胞分泌细胞因子参与固有免疫
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举一反三
【单选题】The outer packing of the raincoats is cartons and looks _________ .
A.
attraction
B.
attract
C.
attractive
D.
beauty
【单选题】python解释器执行 a = """""'aaa'"""""表达式的结果为( ):
A.
\'aaa\''
B.
'""\'aaa\''
C.
语法错误
D.
我不知道
【单选题】The use of shipping mark on the outer packing is not aimed at______
A.
promoting the sales of goods
B.
facilitating shipping and storing
C.
preventing the goods from being wrongly delivered or shipped
D.
facilitating the identification and count of goods in the process of loading and unloading
【判断题】Generally, the full name of the importer, the name of the commodity will appear on the outer packing.
A.
正确
B.
错误
【单选题】The outer packing of the cargoes should meet the following requirements except __________.
A.
Be solid and durable
B.
Be adaptable to the changing climates at the loading and unloading ports
C.
Be uniform so as to convenience storage, calculation, cargo inspection and identification
D.
Have the most weight, volume and cost.
【单选题】Python解释器执行 a = """"" 'aaa' """""表达式的结果为( )。
A.
\'aaa\''
B.
' ""\'aaa\' '
C.
语法错误
D.
我不知道
【简答题】用EDTA溶液滴定金属离子的条件是______。
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