买入套期保值一般可运用的情况是（）。 A.加工制造企业为了防止日后购进原料时出现价格

阅读短文，判断句子是“√”否“×”正确。

     Look, this is my family photograph. The old man is my grandfather. He is shorter than his son, my father.

The woman is my mother. I'm her daughter. The boy is my cousin. I am younger than him. His mother is

Aunt Baiyun. Uncle Zhaowei is Aunt Baiyun's husband. We're a happy family.

( ) 1. My grandfather is shorter than my father.

( ) 2. My cousin is a girl.

( ) 3. My cousin's father is Uncle Zhaowei.

( ) 4. Aunt Baiyun and Uncle Zhaowei have a daughter.

关于家庭安全用电，下列说法正确的是

A．对人体来讲，电压在220V以下的电都是安全的

B．家用电器一般都是并联

C．家庭电路里只有火线和零线

D．有人触电时，你应该马上把人拉开

世界上最古老的花城是我国唐朝时的长安城，当时有花3000余种，您知道那时的长安城是现在的什么地方吗？

什么是脚手架的主节点？为什么在主节点处严禁拆除横向水平杆？

下列属于原始凭证的是______。

A．购货合同
B．生产计划
C．增值税专用发票
D．银行对账单