某线圈在匀强磁场中绕垂直于磁场的转轴匀速转动,产生的交变电流的图像如图所示,由图

题型:选择题

问题:

某线圈在匀强磁场中绕垂直于磁场的转轴匀速转动,产生的交变电流的图像如图所示,由图中信可以判断

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A.  A和C时刻线圈处于中性面位置

B.  B和D时刻穿过线圈磁通量为零

C.  从A~C时刻线圈转过的角度为π/2

D.  若从O~D时刻历时0.02 s,则在1 s内交变电流的方向改变100次

考点:交变电流的图像
题型:选择题

、已知点M(3,—2),将它先向左平移4个单位,再向上平移3个单位后得到N,则点N的坐标为               

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识别疾病遗传基础的方法是什么?

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Homemade Ice Cream in a Bag

Difficulty: Very Easy

Average User Rating:★★★★☆(4.3/5)

Milk can become homemade ice cream in five minutes by using a bag! This homemade, creamy treat is a summertime delight for your kids and you alike.

What you’ll need:

1 tablespoon of sugar; 1/2 cup of milk; 1/4 teaspoon of vanilla (香草香精); 6 tablespoons of rock salt; 1 small-sized plastic food storage bag; 1 gallon-sized plastic food storage bag; ice cubes.

How to make it:

l Fill the large bag half full of ice, and add the rock salt. Seal the bag.

l Put milk, vanilla, and sugar into the small bag, and seal it.

l Place the small bag inside the large one, and seal it again carefully.

l Shake until the mixture turns into ice cream, which takes about five minutes.

l Wipe the top of the small bag, and then open it carefully. Enjoy!

Tips:

1/2 cup of milk will make about one spoon of ice cream, so double the recipe if you want more. But don’t increase the amount more than that—a large amount might be too big for kids to pick up because the ice itself is heavy.

Here is another version of the homemade ice cream recipe from another parent!

These are the homemade ice cream ingredients:

1/4 teaspoon of vanilla butter and nuts; 1 tablespoon of sugar; 1/2 cup of milk.

These are the other supplies:

Plastic sandwich bag; 12 salt pellets; 1 dish of ice; large plastic bag.

Put the ice cream ingredients in the small bag, and then put the bag, salt and ice in the big bag. Hold the bag shut and move it around on the floor for about 5 minutes.

When I made ice cream at home last time, although the salt pellets didn’t really dissolve (溶解) that well, I still got ice cream. It was not smooth ice cream, probably because of the low-fat milk. It was incredible that it could be ready in 5 minutes (not counting preparing the ingredients)

Next, I changed the recipe, using a tablespoon of cocoa, a tablespoon of sugar, and a cup of milk. It was a bit too chocolaty, but good!

小题1:The underlined “that” in “Tips” section refers to ____.

A.1/2 cup of milk

B.1 cup of milk

C.1 spoon of ice cream

D.2 spoons of ice cream小题2:Which of the following things is NOT included in both recipes?

A.Sugar

B.Ice

C.Plastic bag

D.Nuts小题3:Which of the following statements about the second parent is TRUE?

A.He/ She doesn’t agree with the first parent.

B.He/ She doesn’t think five minutes is enough

C.He/ She doesn’t like cocoa better than nuts.

D.He/ She doesn’t think the chocolaty tastes bad.

题型:选择题

第十六界亚运会于()在中国广州举行。

A.2010.10.1

B.2008.8.8

C.2010.11.12

D.2010.11.22

题型:选择题

1927~1936年,是中 * * 党在政治上日益成熟的十年。这种“成熟”表现在()

①探索出一条符合中国国情的革命道路

②妥善处理了党内矛盾和分歧

③提出了彻底的民主革命纲领

④建立起抗日民族统一战线

A、①④

B、①②

C、②③

D、②④

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