血红蛋白含量增多，常见于各种原因引起的脱水。

根据unit3《Teenagers should be allowed to choose their》判断正（T）误（F）。

( ) 1. Teenagers' hobbies always get in the way of their schoolwork.

( ) 2. Liu Yu is fifteen years old and from Shandong.

( ) 3. Liu Yu thinks his parents are very strict with him and never care about him.

( ) 4. Liu Yu thinks only when he is allowed to make the decision for himself can he have a chance to

            succeed.

( ) 5. Liu Yu's parents don't allow him to practice running every day because they want him to spend

            time on his schoolwork.

维生素E₁

A．供试品在碱性条件下水解后，用乙醚萃取，分取乙醚液，加2,2’-联吡啶溶液和三氯化铁溶液，显血红色
B．取供试品1滴，加甲醇10ml和5%氢氧化钾的甲醇溶液1ml，振摇，溶液显绿色；置热水浴中即变为深紫色；放置后，显红棕色
C．显氯化物的鉴别反应
D．显钠盐的鉴别反应
E．取供试品溶液，加二氯靛酚钠试液，试液的红色即消失
以下药物的鉴别反应为

国际联盟：联合国

A．关税贸易总协定：世界贸易组织

B．协约国：同盟国

C．轴心国：同盟国

D．北约：欧盟

采煤循环