20℃时,取四份一定质量的饱和硝酸钾溶液进行如下实验后,所得结论正确的是 A.保

题型:选择题

问题:

20℃时,取四份一定质量的饱和硝酸钾溶液进行如下实验后,所得结论正确的是

A.保持温度不变,减少10g溶剂后,溶液中溶质的质量分数增大

B.保持温度不变,加入10g溶质后,溶液中溶质的质量分数增大

C.保持温度不变,加入10g溶剂后,溶质的溶解度减小

D.降温至10℃后,溶质的溶解度减小

考点:固体溶解度气体溶解度
题型:选择题

briefly (in not more than 3 words) on the Answer Sheet correspondingly.

Located in New South Wales, one of Australia’s most agriculturally, industrially and culturally rich areas, Charles Stuart University (CSU) is an institution of higher learning founded by the Australian government. The faculties such as the Faculty of Arts, Commerce, Education, Health Studies and Science & Agriculture offer courses from Bachelor’s Degree to PhD levels. The university is named in honor of the great explorer Captain Charles Stuart.

CSU has an excellent teaching staff, facilities and services on all campuses and is on the leading edge in the delivery of information technology services. It offers a balance between theory and practice in its courses and collaborates (合作,协调)with universities from several other graduates prepared for entry into the workforce (劳动大军).

CSU attributes much of its success to the factors such as small classes, an accessible academic staff, a relaxed country location as well as its extensive modern facilities. Over the next two years approximately $ 20 million will be spent on capital improvements.

Conveniently located, without pollution, crime, overcrowding or high living costs, enjoying cool winter and dry, sunny summer and friendly people, Charles Stuart University attracts students from all over the world.

What levels of courses does CSU offerThey offer courses from ()to PhD levels.

题型:选择题

中文大写金额数字前应标明“人民币”字样,大写金额数字紧接“人民币”字样填写,也可留有空白。( )

题型:选择题

会计核算软件必须具备输入记账凭证的功能,凭证输入项目主要包括()。

A.凭证填制日期

B.经济业务摘要

C.会计科目或科目编码

D.借贷方金额

题型:选择题

【选修3-4】(8分)如图所示,为等腰直角三棱镜的横截面,,一束激光a沿平行于AB边射入棱镜,经一次折射后射到BC边时,刚好能发生全反射,求该棱镜的折射率.

题型:选择题

如图所示,两个3/4竖直圆弧轨道固定在同一水平地面上,半径R相同,左侧轨道由金属凹槽制成,右侧轨道由金属圆管制成,均可视为光滑。在两轨道右侧的正上方分别将金属小球AB由静止释放,小球距离地面的高度分别为hAhB,下列说法正确的是

A.若使小球A沿轨道运动并且从最高点飞出,释放的最小高度为5R/2

B.若使小球B沿轨道运动并且从最高点飞出,释放的最小高度为5R/2
C.适当调整hA,可使A球从轨道最高点飞出后,恰好落在轨道右端口处
D.适当调整hB,可使B球从轨道最高点飞出后,恰好落在轨道右端口处

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