降钙素对钙磷浓度调节的最终结果为（）。 A．血钙升高，血磷降低 B．血钙降低，血磷升

下列哪项对营养性巨幼细胞贫血的诊断有意义

A．红细胞体积增大

B．红细胞减少比血红蛋白降低明显

C．血清铁、总铁结合力正常

D．骨髓幼红细胞巨幼变

E．周围血象中出现有核红细胞

To many students, high school is just a basic routine. You go to class in the morning, take a break for lunch and go home in the afternoon.

This isn't quite that simple for pupils at Royal West Academy. As if classes and homework weren’t already enough, students are also required to complete a range of extracurricular activities, or ECAs.

The range of ECAs being offered at the school is various, including everything from guitar and jewelry-making clubs, fund-raising marches, to student committees, swimming and tennis.

“I love ECAs. I’m so happy we have them,” said grade 11 student Adrienne, who is a soccer player and member of the graduation committee. “They motivate the students, and they’re a great bonding experience. I think that without them, not half as many students would be joining up for the soccer team.”

Requiring students to complete ECAs is a sign of the times. That’s because young people are preparing for the future in ways that weren’t considered necessary before. This is an era when ECAs are seen as important. Whether it’s for leadership experience, sports, craft skills or volunteer these things are seen as rounding out the individual and improving their future.

ECAs can also help students discover their likes and dislikes. But as the old song says, you can’t always get what you want, especially when so many students are all trying to sign up for the most popular activities.

ECAs can cut into study and homework time if you’re not careful. You really have to get organized or you’ll fall apart.

小题1:The students at Royal West Academy may do the following ECAs except ______.

A．to play musical instruments

B．to raise money for an organization

C．to attend sports events

D．to have classes discussions小题2:From what Adirienne said, we know that _______.

A．most of his classmates are interested in football

B．one can make many new friends in ECAs

C．students get encouraged to join in ECAs

D．half of his classmates are unwilling to join in ECAs.小题3:Why are ECAs important now?

A．They prepare the students for their future.

B．They can make students get what they want.

C．they can help students find their strong points.

D．They can reduce students’ learning time.小题4:From the last paragraph, we can infer that _______.

A．ECAs can increase your burden of learning

B．you may fall down when playing in ECAs

C．too many ECAs may leave you in trouble

D．you need to organize other students in ECAs

世界上水稻产量最多的国家是______；小麦产量最多的国家是______；玉米产量最多的国家是______；烟草产量最多的国家是______；花卉产量最多的国家是______．

有以下六种物质：铁、牛奶、水晶、白酒、水银、饼干．我们可以把它分成两类：

（1）一类包括：______，它们的共同特点是______；

（2）另一类包括：______，它们的共同特点是______．

填写下列植物所属的科。A．厚朴：（）科；B．板栗：（）科；C．泡桐：（）科；D．油桐：（）科