在探究“固体熔化时温度的变化规律”实验中,所用装置如图甲所示。 (1)将装有固

题型:实验题

问题:

在探究“固体熔化时温度的变化规律”实验中,所用装置如图甲所示。

(1)将装有固体的试管放入水中加热,而不是用酒精灯直接对试管加热,这样做不但能使试管受热均匀,而且固体的温度上升速度较     (选填“快”或“慢”),便于及时记录各个时刻的温度。

(2)图乙是根据测得的数据绘制的固体熔化时温度随时间变化的图象。由图象可知,该固体是        (选填“晶体”或“非晶体”),在20min时,该物质是             状态。

(3)在熔化过程中,如果将试管从烧杯中拿出来,该物质停止熔化。将试管放回烧杯后,该物质又继续熔化。说明固体熔化时需要       (选填“吸收”或“放出”)热量。

考点:凝固现象熔化现象
题型:实验题
根据对话内容,从下面方框中选出适当的短语填空,使对话内容完整。
stop smoking;  because of;  are made to;  such as;  have no choice
From January1, 2009 Hong Kong banned(禁止)smoking in most public places. The places include restaurant, workplaces, schools or karaoke bars. And from July1, 2009, it banned some other public places   小题1:    nightclubs, bars or bathhouses. Even smoking in some outdoor places is against the law. For example, beaches, sports ground, museums and most areas of public parks. Hong Kong hopes the ban can prevent people from smoking passively. What’s passive smoking? When people smoke in a restaurant or on a bus, others   小题2:   breathe the smoke too. They don’t want to smoke but they    小题3:  . It does harm to people’s health. And it’ll be better if more people in Hong Kong give up smoking    小题4:    the ban.
If someone breaks the ban, he will have to pay up to HK$5, 000. Now more and more citizen begin to     小题5:  . Today’s Hong Kong is becoming more and more attractive.
题型:实验题

定点生产的毒性中药饮片,应销往()

A.具有经营毒性中药资格的经营单位或直销到医院单位

B.中药经营单位

C.医药经营单位

D.个体经营户

E.一般的零售药店

题型:实验题

下列关于婴儿运动发育的叙述,正确的是()

A.1个月时能抬头

B.2~5个月会爬

C.7~8个月能扶着走

D.9~10个月会坐

E.12个月会独走

题型:实验题

供电的频率是用来衡量供电系统( )的指标。

A.供电的可靠性

B.电能质量

C.安全运行

D.经济运行

题型:实验题

对原厅局级以上职务犯罪罪犯减刑、假释、暂予监外执行的,裁定、决定或者批准后几日内,由省级政法机关向相应中央政法机关逐案报请备案审查。()

A、十日

B、五日

C、二日

D、六日

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