GB/Z19579《卓越绩效评价准则实施指南》是______。A．国家标准 B．行业

现有甲、乙、丙、丁四根导线．甲：长为1m，横截面积为1mm²的镍铬合金线；乙：长为1m，横截面积为0.5mm²的镍铬合金线；丙：长为0.5m，横截面积为1mm²的镍铬合金线；丁：长为1m，横截面积为0.5mm²的锰铜线．为了研究导体的电阻与导体长度的关系，应选用其中的两根导线是（　　）

A．甲和丙

B．乙和丙

C．丙和丁

D．以上三种选择都可以

「お茶のおかわり、いかがですか？」「あ、もう、　　　　。そろそろ帰りますので。

A．おまたせしました　

B．おかまいなく

C．かしこまりました

D．ごえんりょなく

女，50岁，右下颌多个残根，既往有风湿性心脏病，现存二尖瓣狭窄。此患者的最佳治疗方案为

A．分次拔除，术前术后预防性使用抗生素

B．分次拔除，术盾预防性使用抗生素

C．分次拔除，术前预防性使用抗生素

D．一次拔除，术前术后预防性使用抗生素

E．一次拔除，术后预防性使用抗生素

When you stop and think about your high school or college alma mater, were your experiences more positive or negative Do your feelings of (1) in that school have anything to do with whether or not your school was single-sex or coed (2) to send their children to single-sex schools, because they feel both (3) when they study in the company of students of the same sex. They (4) .
For years, only parents who could afford to send their children to private schools, or who had (5) , chose single-sex education for their children. Single-sex schooling was (6) for most American families. Today, however, along with (7) , public schools are experimenting with the idea of (8) .
Girls may be the ones who benefit most from single-sex schooling. Studies have shown that (9) in coed classrooms because teachers sometimes pay more attention to boys. Girls’ (10) toward their studies tends to disappear as they begin to feel less successful. They start to (11) outperform them in math and science. As boys (12) , girls start to lose it. Moreover, adolescence is (13) for girls. As they experience adolescent changes, some girls become depressed, develop an addiction, or suffer from (14) .
In the early 1990s, some influential people said that being in single-sex classes could (15) . Schools across the country began creating single-sex classrooms and schools. But many critics claim that (16) may actually be detrimental to a girl’s education because they (17) of sex differences.
The renewed interest in single-sex schooling (18) among Americans. Those who give it full endorsement believe girls need an all-female environment to take risks and find their own voices. Those who (19) of single-sex schooling wonder whether students’ lack of achievement warrants returning to an educational system that divides the sexes. They believe there is no (20) .

借款人涉及重大经济案件是次级贷款的特征之一。