－－ Mary, this is Joe's brother David.－－ _____A. I'm very glad to meet you.B

A.either

B.any

C.neither

D.none

John: Mary ,this is Joe’s brother David.

Mary: I’m very glad to meet you.

David: It’s a pleasure to meet you.

Mary: __________

David: It’s really different from what I expected.

John: Don’t worry . You’ll get used to it in no time.

A.How are you doing so far？

B.Would you like some tea？

C.How is Joe？

D.How do you like Florida so far？

画出下述两种商品个人偏好的无差异曲线:汉堡包和软饮料。指出个人满足[或效用)增加的方向:（1)乔

画出下述两种商品个人偏好的无差异曲线:汉堡包和软饮料。指出个人满足[或效用)增加的方向:

(1)乔的无差异曲线为凸的，不喜欢汉堡包和软饮料。

(2)简喜欢汉堡包，但不喜欢软饮料。如果服务员给她一杯软饮料，她会不喝倒掉。

(3)鲍勃喜欢汉堡包,但不喜欢软饮料。但是如果服务员给他一杯软饮料，为了礼貌他会喝掉。

(4)莫利喜欢汉堡包和软饮料,但坚持精确地按照两个汉堡包搭配一杯软饮料来吃。

(5)比尔喜欢汉堡包，但对软饮料无所谓喜欢或不喜欢。

(6)玛丽从额外一个汉堡包中获得的满足是从额外一杯软饮料中获得的满足的两倍。

Draw indifference curves that represent the following individuals ’preferences for hamburgers and soft drinks. Indicate the direction in which the individuals' satisfaction (or utility) is increasing.

a. Joe has convex indifference curves and dislikes both hamburgers and soft drinks

b. Jane loves hamburgers and dislikes soft drinks. If she is served a soft drink, she will pour it

down the drain rather than drink iT.

c. Bob loves hamburgers and dislikes soft drinks. If he is served a soft drink, he will drink it to be polite.

d. Molly loves hamburgers and soft drinks, but insists on consuming exactly one soft drink for every two hamburgers that she eats.

e. Bill likes hamburgers, but neither likes nor dislikes soft drinks.

f. Mary always gets twice as much satisfaction from an extra hamburger as she does from an extra soft drink.

rd，buttheycanrshfromSYSTEMBtoSYSTEMA.Nootherusersareexperiencingthesameissue.Bothsystemshavea/home/joe/.rhostsfilethatcontaintheproperreferencestotheotherhost.The/home/joe/.rhostsfilesonbothSYSTEMAandSYSTEMBareownedbyuserid’joe’.Whichofthefollowingisthemostlikelycauseofthisproblem？（）

A.User’joe’isspecifiedinthe/etc/nologinonSYSTEMA

B.User’joe’isspecifiedinthe/etc/nologinonSYSTEMB

C.Thefilepermissionsonthe/home/joe/.rhostsfileonSYSTEMAiscorrect.

D.Thefilepermissionsonthe/home/joe/.rhostsfileonSYSTEMBisincorrect.

Joe: How are you getting along in math class？

Jane: ______.

A.is

B.weighs

C.weigh

A.一个系统权限被授予用户JOE

B.一个对象权限被授予用户JOE

C.用户JOE被授予在这个对象上的所有权限

D.一个系统权限和一个对象权限被授予用户JOE