The foreigners ______ visited our school

已知-1≤x≤0，求函数y=2^x+2-3•4^x的最大值和最小值．

根据所给汉语提示完成句子

l. If you can't speak good English, you'll be at a big _____ (不利) when you try to get a job.

2. My rnom said she would buy me a new _____ (个人的) computer if' I got good grades in the coming exams.

3. -Did you open your present ?

    -That box?  Is it for me? I thought you _____ (给) it to my brother, Sam.

4. Don't leave all the _____ (孩子) in the big house. I think it will .be a little dangerous!

5. With the teacher's help, John made much _____ (进步) in this semester.

---I like to eat cakes with cream on top.

---___________! They are delicious.

A．Good luck

B．Me too

C．I hope so

D．You’re kidding

某病的发病率指的是（）。

A.一定时期内，某人群中发生某病例的频率

B.一定时期内，某人群中发生某病新病例的频率

C.一定时期内，某人群中发生所有疾病新病例的频率

D.一定时期内，所有患病人数占总人口数的比例

E.以上均不正确

艾克森提出的划分人格的维度包括（）。

A.外倾

B.宜人

C.神经质

D.责任心

E.开放