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【判断题】
HSK1 、 2 级是没有主观题目的A.
正确
B.
错误
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举一反三
【单选题】Why did most people learn English before World War Ⅱ?
A.
To speak English.
B.
To read technical books in English.
C.
To listen to English programs on radio.
D.
To read English literature.
【单选题】The shock of the electric catfish is more unpleasant than that of the torpedo or electric eel.
A.
Y
B.
N
C.
NG
【多选题】下面关于内连接的说法中,描述正确的是
A.
内连接使用 INNER JOIN 关键字来进行连接
B.
内连接使用 CROSS JOIN 关键字来进行连接
C.
内连接又称自然连接
D.
内连接只有满足条件的记录才能出现在查询结果中
【多选题】下面关于内连接的说法中, 描述正确的是
A.
自连接是一种内连接
B.
使用 WHERE 子句可以实现内连接同样的功能
C.
内连接语法格式中的 INNER JOIN 不能略写为 JOIN
D.
内连接可以得到被连接的两个表中所有数据行的笛卡尔积
【简答题】One of the advantages of the gasoline car over the electric one is that the gasoline car is relatively ______ to refuel.
【单选题】The electric plates on the electric eel are supplied with nerves from its brain.
A.
Y
B.
N
C.
NG
【简答题】S4. Why did many parents fail to make the most of their children’s intelce?
【单选题】The electric plates on the electric eel______.
A.
run along the length of its body
B.
are found on sides of its head
C.
are located in its head
D.
are in its tail
【单选题】The electric locomotive benefits from the high efficiency of the electric motor. Additional efficiency can be gained from ( ).
A.
the electric motor
B.
the regenerative braking
C.
the brake shoe
D.
the main transformer
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