在识别电路时对下列电路元件采取的简化方式正确的是：[ ] A．把电流表看成导线

工务段是防灾安全监控系统的设备管理单位，应建立健全相关设备台帐，备有防灾安全监控系统（）

A、网络结构图

B、产品操作维护手册

C、本系统工程竣工资料

若某保险公司对甲、乙两国的建筑工程一切险的统计资料如下表，则甲、乙两国的该险种的损失机会与风险分别为( )。

A．甲国；1%；1/10

B．甲国；2%；2/10

C．甲国；1%；2/10

D．乙国；1%；1/4

E．乙国；2%；1/5

关黄柏的粉末显微特征是

A．石细胞壁厚，层纹明显

B．石细胞鲜黄色

C．周围细胞含草酸钙方晶

D．纤维鲜黄色，成束

E．草酸钙砂晶极多

Now that you’ve gotten a little more confident, we’re going to give you the opportunity to practice "without the training wheels." When you want to check your work, you can turn to the solutions at the end. If you aren’t familiar with some of the mathematical concepts, make a note to pay particular attention to that chapter in this book; this practice set covers a wide range of topics tested on the GMAT.
On all data sufficiency problems, the answer choices are the same (as you’ve learned). We’ve put them here for your reference.
Ａ. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Ｂ. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
Ｃ. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
Ｄ. EACH statement ALONE is sufficient.
Ｅ. Statements (1) and (2) TOGETHER are NOT sufficient.

A shelf contains only books of poetry, short stories, and non-fiction. If Jana draws a book randomly off the shelf, what is the probability that the book will be non-fiction
(1) There are 15 books on the shelf.
(2) There are 4 books of poetry and 5 books of short stories on the shelf.

气体灭火系统管道公称直径大于或等于50mm的主干管道，垂直方向和水平方向至少应各安装一个（）。当穿过建筑物楼层时，每层应设一个（）。当水平管道改变方向时，应设（）。

A、吊架

B、活动支架

C、防晃支架