完形填空Mostofuscanrememberthedayswhenwedidn'tusee-mailasaneverydayvehicleforcommunication.Slowlybutsurelyitcreptinto1.E-mailisa2toolforcollegestudentsatanylevel.It'savailable
完形填空
Most of us can remember the days when we didn't use e-mail as an everyday vehicle for communication. Slowly but surely it crept into 1 . E-mail is a 2 tool for college students at any level. It's available 24 hours a day 7 days a week and 3 at holidays. Most universities assign students an account upon entrance 4 there is usually not even an option (choice) involved.
You can do everything from consulting on homework and projects 5 classmates family and friends arid getting daily news services to 6 you informed of world 7 . But what are the 8 ?
E-mail can. be e-jail. You might 9 hours writing and replying to e-mail. 10 you should be busy with the books for an upcoming exam. 11 you might be signed up for so many daily services 12 horoscopes news services or personals that your mailbox is so 13 “junk mail ” the finding the 14 e-mails through your box might take hours.
If you're a student 15 is precious. Create and organize your e-mail folders into important school-related mail correspondence with friends and family and a folder for jokes horoscopes and other news services. 16 put the mail into the proper folders first and when you're finished head for the important school-related folder first. Respond to the most important e-mails first and 17 you have time you can get to the others.
18 your friends from forwarding those tiresome joke lists sex quizzes and chain mails. The minute you 19 you've got one delete it 20 so you won't be tempted to read it.
1．
[ ]
2．
[ ]
3．
[ ]
4．
[ ]
5．
[ ]
6．
[ ]
7．
[ ]
8．
[ ]
9．
[ ]
10．
[ ]
11．
[ ]
12．
[ ]
13．
[ ]
14．
[ ]
15．
[ ]
16．
[ ]
17．
[ ]
18．
[ ]
19．
[ ]
20．
[ ]
设函数fn（x）=xn+bx+c（n∈N+,b,c∈R）（1）设n≥2,b=1,c=-1,证明：设函 2020-03-30 …
若集合M={y|y=x2,x∈R},N={y|y=x+2,x∈R+},则M∩N等于（ ）急用呀`` 2020-05-16 …
组合公式用组合的方法证明：对任意正整数n,C(r,r)＋C(r+1,r)＋…＋C(n,r)＝C(n 2020-05-23 …
9.已知Xn+,Y（n+1）+,Zn-,R(n-1)-四种微粒都具有相同的电子层结构,则这4种离子 2020-06-02 …
请教高手给出概率解释（大三以上的进）C(m,k)*C(n-m,r-k)/C(n,r)=C(r,k) 2020-06-11 …
某企业连续n年,每年年初向银行借贷A万元,借款年利率为r,每半年复利计息,则第n年末一次归还贷款额 2020-06-20 …
证明C(n,r)+C(n-1,r)+.C(r,r)=C(n+1,r+1)应该是这样的. 2020-07-30 …
下列命题中不正确的是A.任意a,b∈R,an=a*n+b,有{an}是等差数列B.存在a,b∈R, 2020-07-30 …
什么是二项式的通式?在二项式定理(a+b)^n=C(n,0)a^n+C(n,1)a^(n-1)b+ 2020-07-31 …
一个关于组合的证明题——证明：C(n+m,r)=C(n,0)C(m,r)+C(n,1)C(m,r- 2020-08-01 …