下面对图层蒙板的显示、关闭和删除描述哪些是正确的()

Directions:Inthissection,youwillhear10shortconversations.Attheendofeachconversation,aquestionwillbeaskedaboutwhatwassaid.Boththeconversationandthequestionwillbespokentwice.Aftereachquestiontherewillbeapause.DuringthepauseyoumustreadthefourchoicesmarkedA),B),C)andD),anddecidewhichisthebestanswer.ThenmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecenter.

1.A)Dosometyping.

B)Buysomepaper.

C)Askthemantotype.

D)Wanttorunwiththeman.

2.A)10:50

B)10:15

C)10:48

D)10:52

3.A)Husbandandwife.

B)Agirlandherboyfriend.

C)Teacherandstudent.

D)Oldfriends.

4.A)Policeman.

B)Salesman.

C)Cardriver.

D)Conductor.

5.A)Inaschool.

B)Inatheater.

C)Inarestaurant.

D)Athome.

6.A)Sheagreed.

B)Shedisagreed.

C)Shewasimpatient.

D)Shewasworried.

7.A)Somethingcold.

B)Coffee.

C)Tea.

D)Somethinghot.

8.A)Gold.

B)Blue.

C)Brown.

D)Black.

9.A)Hedidn’knowtwheretofindtheprofessor.

B)Hehaddifficultydoingtheexperiment.

C)Hefailedtheexam.

D)Hecouldn’graduatetfromtheuniversity.

10.A)Themaniscoughing.

B)Themangaveupsmoking.

C)Themanhasalungdisease.

D)Themanhasaheartattack

Photoshop中存在选区的情况下，如果按Alt键单击路径调板上的“从选区建立工作路径”按钮，并在弹出的对话框中输入一个数值，可以确定所建立的路径与选区的逼近程度，对此叙述正确的是哪几项。()

下列哪个色彩模式的图象不能执行可选颜色命令：

Photoshop中在使用渐变工具创建渐变效果时，选择其“仿色”选项的原因是()