求过点A（2，3）且被两直线3x+4y-7=0，3x+4y+8=0截得线段为32

控制癫痫患者再抽搐，可选用的药物不包括（）

A.吗啡

B.劳拉西泮

C.地西泮

D.苯妥英钠

E.苯巴比妥

言语频率通常是指：（）

A.20～20000Hz

B.125～8000Hz

C.500～2000Hz

D.1000～3000Hz

E.2000～4000Hz

倒闸操作应认真执行（）。

A、工作许可制度

B、监护复诵制

C、工作监护制度

D、连责制

非糖物质转变为葡萄糖或糖原的过程（）

A.糖原

B.糖酵解

C.糖异生

D.单糖

E.有氧氧化

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.

What is the ratio of 2a to b
(1)

(2) a+b=5