电梯八大系统通常包括曳引系统、门系统、轿厢系统、重量平衡系统、导向系统、电梯拖动系统、安全保护系统与（     ）。

Do not use a column when you wish to show a trend or a ...

判断题Do not use a column when you wish to show a trend or a pattern of relationship between sets of values.

We didn't enjoy the holiday ______ the weather was bad....

单项选择题We didn't enjoy the holiday ______ the weather was bad.
A、though
B、so
C、even though
D、because

A、 B、 C、 D、

多项选择题
A、
B、
C、
D、