曲线区段，支柱应设于信号显示前方的（）m以外。

根据短文内容及首字母提示，补全空格内单词，使短文完整、通顺。

    In the United States, children start school when they are five years old. In some states they must

stay in school (1)u            they are sixteen. Most students are seventeen or eighteen years old when

they (2)l            high school. There are (3)t            kinds of school in the United States: public school

and private school. (4)M            children go to public schools. Their parents do not have to (5)p            

for their education because the schools receive money from the government. If a child goes to a private

school, his parents (6)h            to pay enough money for his schooling. Some parents still choose private

schools, though they are much more (7)e           . 

   Today about half of the high school students go to universities (8)a            they finish the high school.

A student at a state university does not have to pay too (9)m            if his parents live in this state. 

    But many students work while they are studying at universities. In this way they can have good working

habits and live by their own (10)h           .

自身免疫性重症肌无力和先天性肌无力综合征的区别在于（）。

A.是否血清出现抗乙酰胆碱受体，抗体升高

B.是否对抗胆碱酯酶药物有效

C.是否肌电图低频重频剌激有效

D.是否出现肌疲劳现象

E.是否新斯的明试验阳性

初孕妇，停经6周时出现 * * 少量流血，来院就诊。妇科检查见子宫约鹅卵大，质软，宫口未开，见仍有少许新鲜血流自宫内流出。尿妊娠试验阳性。关于本例的讨论及处置，下列哪项恰当（）

A.尿妊娠试验阳性表明胚胎正常且仍然存活

B.不存在葡萄胎的可能性

C.服用止血药物

D.安静卧床，保胎治疗，观察病情变化

E.及早刮宫

患者，男性，20岁，双眼反复发红1年，视力下降2个多月。Vod0.3，Vos0．4，Tod45mmHg，Tos42mmHg。双眼结膜轻度充血，角膜透明，前房轴深4C．T．，房水清，瞳孔4mm×4mm，晶状体后囊下混浊，C／D0．8。患者因"结膜炎"自行使用"的确当"眼药水1年。有"窦性心动过缓"史，心率55次／分。

患者正确的诊断应该是（）.

A.原发性开角型青光眼

B.青少年型青光眼

C.糖皮质激素性青光眼

D.慢性闭角型青光眼

E.青光眼合并先天异常

婚礼摄影最适合的相机是（）

A、135胶片相机

B、120胶片相机

C、数码轻便相机

D、数码135单反相机