女性，28岁，在工作中突然倒地，意识不清，四肢阵发性抽搐，小便失禁，约1分钟后逐渐清

白疕的皮损特征有哪些（）

A.红斑鳞屑，刮去鳞屑有点状出血现象是

B.红斑上有油腻性鳞屑是

C.与皮纹方向一致的红斑，糠秕状鳞屑是

D.贴膏药引起局部边缘清楚的红斑是

E.红斑、丘疹、水疱、丘疱疹、糜烂、流水是

如图所示，一个内壁光滑的圆锥形筒的轴线垂直于水平面，圆锥筒固定不动，两个质量相同的小球A和B紧贴着内壁分别在图中所示的水平面内做匀速圆周运动，则（　　）

A．球A的线速度一定大于球B的线速度

B．球A的角速度一定小于球B的角速度

C．球A的运动周期一定小于球B的运动周期

D．球A对筒壁的压力一定大于球B对筒壁的压力

请根据下面短文回答下列题：
Safety Rules for Bike-Riding.
1. Never ride out into a street without stopping first.
2. Watch for stop signs.
3. Look behind before turning or changing lanes (车道) .
4. Always ride on the right.
5. Never follow another rider without applying the rules.
Remember, your bicycle is a small compared with cars and trucks. It is not easily seen on crowded streets and will seldom attract attention on its own. At all times, do everything you can to make sure you are noticed.

What should a bike-rider do when he / she rides after another rider
[A] Watches for stop signs.
[B] Changes lanes.
[C] Applies the safety rules.

小明读一本书已读与未读的页数之比为3：4，后来又读了33页，已读与未读的页数之比变为5：3，这本书共有多少页。（）

A．166

B．167

C．168

D．169

化学品防爆柜有两个通风口，如果有一个被其他物品遮挡，是允许的（）