急性鼻窦炎的三大局部症状是（）。 A.鼻塞、喷嚏、头痛 B.鼻塞、脓涕、头痛 C.鼻

水果包装地每天包装600箱苹果，照这样计算，包装一星期（按五天计算）能包装多少箱苹果？

现有A、B、C、D四种常见的短周期主族元素，它们之间的关系如下：

I．原子半径：A<C<B<D

II．原子的最外 层电子数：A+C=B+D=8

III．原子的核外电子层数：B=C=2A

IV．B元素的主要化合价：最高正价+最低负价=2

请回答：

（1）由A、B两种元素组成的常见气体，其电子式为            ；只有A和B两种元素组成的属于离子晶体的化合物可能为        （用化学式表示）。

（2）由D元素形成的氢氧化物，与强碱溶液反应的离子方程式为              。

（3）由B、C元素组成的化合物BC₃，该化合物具有强氧化性，与水反应生成两种酸和一种无色气体，该气体常温下遇空气变红棕色，写出该化合物与水反应的化学方程式       。

（4）由A、B和C三种元素组成的盐，常温下其水溶液显酸性，则0.1mol·L^-1该盐溶液中浓度最大的离子为             （写离子符号）。

（5）由A、B、C和D四种元素组成的配位化合物，其化学式为          ；写出检验该配位化合物中所含阳离子的实验方法             。

What could make Michael Jordon, one of the greatest basketball players in history, shed tears?  It was when he became a member of the Basketball Hall of Fame on September 11. The hall is in Springfield, Massachusetts and honors the best basketball players, greatest coaches and other contributors to the game. “The game of basketball has been everything to me ,” said Jordan, 46. “It is the place I have always gone when I needed to find comfort and peace.”

Jordan retired twice in his 15-year career, finishing with 32292 points, the third highest total points in NBA history behind Kareem Abdul-Jabbar and Karl Malone. His average of 30.12 points a game is the best in the League.

“One day you might look up and see me playing the game at 50,” Jordan said. “Because limits, like fears, are often just an illusion.” (假象) In other words, it was motivation that made Jordan such a success..

A great career did not mean a smooth one. His high school coach cut him from the team in favor of a taller player when Jordan was in 10^th grade. His college coach wouldn’t allow him on the cover of Sports Illustration in 1981 with North Carolina’s four other players because Jordan was a freshman. In his first NBA All-Star game, older NBA stars wouldn’t throw him the ball because of jealousy.

“That burned me up,” Jordan said. “But obstacle don’t have to stop you. If you run into a wall, don’t turn around and give up. Figure out how to climb it, go through it, or work around it.”

小题1: When Jordan became a member of the Basketball Hall of Fame,_____

A．he found something more encouraging .

B．he was so excited that he couldn’t hold his tears back.

C．he was happy and sad at the same time.

D．he felt very comfortable and peaceful.小题2:Who scored the highest total points in NBA history?

A．Michael Jordon.

B．Karl Malone.

C．Kareem Abdul-Jabbar.

D．Kobe Bryant.小题3:When in college basketball team, Jordan ______

A．was not experienced enough to be favored by his coach.

B．was the pet of his basketball coach.

C．was the best player in the team

D．was the tallest one of all basketball players.小题4: What does the word “obstacle” mean in the passage?

A．Something that makes you feel uncomfortable

B．The coach who thinks you are not suitable for playing basketball.

C．A wall in the basketball court to stop players in training.

D．Something that makes it difficult for you to achieve your goal.

俯卧压背法的频率为每分钟（）次。

A.16～18

B.26～28

C.36～38

D.46～48

油泵油压低如何处理？