根据水解产物不同来分类,五倍子鞣质属于() A.咖啡鞣质 B.逆没食子鞣质

题型:单项选择题 A1型题

问题:

根据水解产物不同来分类,五倍子鞣质属于()

A.咖啡鞣质

B.逆没食子鞣质

C.可水解鞣质低聚体

D.缩合鞣质

E.没食子鞣质

考点:主管中药师鞣质鞣质题库
题型:单项选择题 A1型题

调节内脏活动和内分泌活动的皮质下中枢是()

A.上丘脑

B.延髓

C.下丘脑

D.丘脑

E.底丘脑

题型:单项选择题 A1型题

如图所示,虚线上方有场强为E1=6×104N/C的匀强电场,方向竖直向上,虚线下方有场强为E2的匀强电场,电场线用实线表示,另外,在虚线上、下方均有匀强磁场,磁感应强度相等,方向垂直纸面向里,ab是一长为L=0.3m的绝缘细杆,沿E1电场线方向放置在虚线上方的电、磁场中,b端在虚线上,将一套在ab杆上的带电量为q=-5×10-8C的带电小环从a端由静止释放后,小环先作加速运动而后作匀速运动到达b端,小环与杆间的动摩擦因数μ=0.25,不计小环的重力,小环脱离ab杆后在虚线下方仍沿原方向作匀速直线运动.

(1)请指明匀强电场E2的场强方向,说明理由,并计算出场强E2的大小;

(2)若撤去虚线下方电场E2,其他条件不变,小环进入虚线下方区域后运动轨迹是半径为L/3的半圆,小环从a到b的运动过程中克服摩擦力做的功为多少?

 

题型:单项选择题 A1型题

This place was darker than I expected, and, in spite of the rain, dirtier. Used to the life of rural Puerto Rico(波多黎各), I had to adjust to the similarly arranged, aggressive two-dimensionality of New York. Everywhere I looked, my eyes met gray and brown straight-edged buildings with sharp corners and deep shadows. Every few blocks there was a cement(水泥) playground surrounded by chain-link fence.

A girl came out of the building next door, a jump rope in her hand, and she hopped over. “Are you Hispanic?” she asked. “No, I’m Puerto Rican.” “Same thing. Puerto Rican, Hispanic. That’s what we are here.” She skipped a tight circle, stopped abruptly, and shoved the rope in my direction. “Want a turn?”

“Sure.” I hopped on one leg, then the other. “So, if you’re Puerto Rican, they call you Hispanic?”

“Yeah. Anybody who speaks Spanish.”

I jumped a circle, as she had done, but faster. “You mean, if you speak Spanish, you’re Hispanic?”

“Well, yeah. No . . . I mean your parents have to be Puerto Rican or Cuban or something.”

“Okay, your parents are Cuban, let’s say, and you’re born here, but you don’t speak Spanish. Are you Hispanic?”

“I guess so,” she finally said. “It has to do with being from a Spanish country. I mean, you or your parents, like, even if you don’t speak Spanish, you’re Hispanic, you know?” She looked at me uncertainly. But I didn’t know. I’d always been Puerto Rican, and it hadn’t occurred to me that in New York I’d be someone else.

Later, I asked. “Are we Hispanics, Mami?” “Yes, because we speak Spanish.” “But a girl said you don’t have to speak the language to be Hispanic.” “What girl? Where did you meet a girl?” “Outside. She lives in the next building.” “Who said you could go out to the sidewalk? This isn't Puerto Rico. Something could happen to you.”

I listened to Mami’s lecture with depressed eyes and the necessary respect. But inside, I quaked. Two days in New York, and I’d already become someone else. It wasn’t hard to imagine that greater dangers lay ahead.

小题1:The first paragraph suggests that the author experienced New York as      .

A.mysterious and unknowable

B.regular and depressing

C.orderly and appealing

D.impressive and dangerous小题2:For the author, being considered Hispanic represents      .

A.a restriction to be overcome

B.an opportunity for self-redefinition

C.the loss of her former identity

D.an unavoidable result of movement to a new place小题3:The mother refers to “Puerto Rico” in order to impress upon the author that       .

A.she should not miss her birthplace

B.New Yorkers may not like newcomers

C.different rules apply to life in New York

D.life was more restricted in Puerto Rico小题4:The author’s mood can best be described as      

A.angry and confused

B.fearful and uncertain

C.excited but lonely

D.worried and resistant

题型:单项选择题 A1型题

风水之名最早见于()

A.《内经》

B.《金匮要略》

C.《诸病源候论》

D.《东垣十书》

E.《丹溪心法》

题型:单项选择题 A1型题

纳税人被工商行政管理机关吊销营业执照的,应当自营业执照被吊销之日起30日内,向原税务登记机关申报办理注销税务登记。( )

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