小明设计的研究“电磁铁磁性强弱”的实验电路图如图所示,下表是他所做实验的记录。

题型:实验题

问题:

小明设计的研究“电磁铁磁性强弱”的实验电路图如图所示,下表是他所做实验的记录。

(1)下列结论不正确的是_______。

A.比较1、4两次实验可知:线圈中的电流一定时,匝数越多,磁性越强

B.比较1、3、5三次实验可知:匝数一定时,线圈中的电流越大,磁性越强

C.比较1、2、3(或4、5、6)三次实验可知:匝数一定时,线圈中的电流越大,磁性越强

D.电磁铁的磁性越强,吸引铁钉的数目越多

(2)用图中所示的电路进行实验,能研究:__________;_________。

考点:影响电磁铁磁性的因素
题型:实验题

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空,并将答案填写在答题卡上标号为31-40的相应位置。

Doctors urge more playtime for children

The American Academy of Pediatrics (儿科) says   小题1:  children really need for health development is more good, old-fashioned playtime.

Many parents load their 小题2:  (child) schedules with get-smart videos, enrichment activities and lots of classes in a drive to help   小题3:   do better. The efforts often begin as early as babyhood. Free play is neglected in the shuffle, a new academy report says.

Numerous studies have shown that free play is very   小题4:   (benefit). It can help children become creative, develop problem-solving skills, relate to others and adjust to school settings,  小题5:   academy report says.

“Perhaps above all, play is something   小题6: is a cherished part of childhood,” says another report,   小题7: (prepare) by two academy committees for release Monday    小题8:  the group's annual meeting in Atlanta.

It adds that enrichment tools and organized activities can be helpful,  小题9:   should not   小题10:   (view) as a requirement for creating successful children. They must be balanced with plenty of free playtime.

题型:实验题

手厥阴心包经的络穴的主治病证是()

A.癫狂、胁痛、气喘

B.心痛,呕吐、呃逆、癫痫

C.心痛、呕血、咯血、鼻衄

D.胸痛、咳嗽、耳聋耳鸣

E.热病、中暑、舌强肿痛

题型:实验题

硅酸盐水泥初凝时间不得早于()分钟。

A.15

B.25

C.35

D.45

题型:实验题

男性青年,因车祸致胫腓骨中下1/3处开放性粉碎性骨折,行彻底清创术,摘除所有的粉碎的骨片,术后行牵引治疗8个月后,骨折仍未愈合,其最可能的原因是

A.骨折处血液供应差
B.伤肢固定不确切
C.清创时摘除了过多的碎骨片
D.功能锻炼不够
E.未作内固定

题型:实验题

在业务活动中,银行从业人员不得向客户明示或暗示诱导客户规避金融、外汇监管规定。

A、正确

B、错误

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