将函数f（x）=2sin（2x+$\frac{\mathrm{\pi }}{4}$）的图象向右平移φ（φ＞0）个单位，再将图象上每一点的横坐标缩短到原来的$\frac{1}{2}$倍（纵坐标不变），所得图象关于直线x=$\frac{\mathrm{\pi }}{4}$对称，则φ的最小值为（　　）

甲、乙、丙三人分别做托里拆利实验，测出了管中水银柱长度分别为74.0cm、75.6cm、76.0cm，已知其中一管中混有空气，另一玻璃管没有竖直放置，只有一人操作方法正确，那么当时的大气压值为____ 高水银柱　．

    Alice is a white dog. She is two. Bob is a brown dog. Bob and Alice are good friends. Look at the two dogs.

Bob: Good morning!

Alice: Good morning!

Bob: What's this?

Alice: It's a jacket. It's my sister's. Oh, my sister is Grace.

Bob: What's that?

Alice: It's a book. It's Miss Miller's book. She is an English teacher.

Bob: Well, dogs don't like books.

“知屋漏者在雨下，知政失者朝野”。“要防止滥用权力，就必须以权力制约权力”。这两种观点启示我们应该（    ）