胸腺的特征性结构是（） A.被膜 B.皮质 C.髓质 D.胸腺小叶 E.胸腺小体

脾梗死声像图是：()① 病变常位于近脾门处，呈楔形或不规则形，基底较宽，有时直达脾包膜，常呈低回声；② 病变内无血供；③ 病变内可出现钙化的强回声，或坏死出现无回声区；④ 伴有腹水

A．①②③

B．①③

C．②④

D．④

E．①②③④

龙衣的正名是（）

A.通草

B.蛇蜕

C.香附

D.独活

E.浙贝

补全对话。请阅读下面对话，从方框内7个选项中选择5个恰当的句子完成对话，并在答题卷上将其序号涂黑。其中有两个句子是多余的。(每小题1分)。

Z="Zoo" manager, C="City" government

Z: What about giving us more money?

C: I'm sorry, but the government doesn't have any more money for the zoo.

Z: But if we don't. find a solution soon, then we'll have to close it. 小题1:_______________ It's a tourist attraction.

C：Yes, but that's the point. 小题2:           You're going to have to find the money from somewhere else.                                                    

Z: 小题3:            Some of these animals are endangered. If we didn't have zoos, they would die.

C: 小题4:            What if you advertised (做广告) the zoo more? In the newspaper or on the radio, for example.

Z: But if we don't have any money, we can't advertise.

C: 小题5:＿＿＿＿＿＿＿

Z: Actually, that isn't a bad idea. You might be right!

C: I have the names of some company managers you could meet…

如图11所示，用一个平行于斜面向上的恒力将质量m=10.0kg的箱子从斜坡底端由静止推上斜坡，斜坡与水平面的夹角θ=37°，推力的大小F=100N，斜坡长度s=4.8m，木箱底面与斜坡的动摩擦因数μ=0.20。重力加速度g取10m/s²，且已知sin37°=0.60，cos=0.80。求：

(1)木箱沿斜坡向上滑行的加速度的大小。

(2)木箱到滑斜坡顶端时速度的大小。

进行静脉注射时，应选择粗直，弹性好，不易滑动，避开关节和静脉瓣，而易于固定的静脉。