将部分装载舱安排在较狭窄的货舱内，可以（）。A．增大剩余动稳性值 B．改善散粮船稳性

下列说法正确的是

A．若以w₁和w₂分别表示浓度为amol·L^-1和bmol·L^-1氨水的质量分数，且知2a=b，则w₂>2w₁（氨水的密度比纯水的小）

B．7.8gNa₂O₂与CO₂完全反应，转移0.2mol电子

C．CO₂、SO₃、NO₂和水反应均能生成酸，都属于酸性氧化物

D．NaHCO₃、Na₂CO₃、(NH₄)₂CO₃三种固体受热后均能生成气体

芥子气和路易气属于（）

A.神经性毒剂

B.糜烂性毒剂

C.全身中毒剂

D.窒息性毒剂

E.刺激性毒剂

简述小汽轮机的通流级数？

治疗大腹水肿兼头疮顽癣

A．甘遂
B．牵牛子
C．芫花
D．巴豆
E．京大戟

CONVERSATION 2 (Questions 5-8)

The age when Miss Rowling started to write: (5) .
Miss Rowling considers herself very luck because she can (6) herself by writing.
Miss Rowling never really imagines a (7) audience when writing.
Miss Rowling (8) know where the ideas for the Harry Potter books came from.

CONVERSATION 2 (Questions 5-8)

The age when Miss Rowling started to write: (5) .
Miss Rowling considers herself very luck because she can (6) herself by writing.
Miss Rowling never really imagines a (7) audience when writing.
Miss Rowling (8) know where the ideas for the Harry Potter books came from.