【单选题】Why does Rose have to make a phone call?
B.
To ask the address of the warehouse
C.
To complete a shipping order
D.
To ask the e-mail address
【单选题】两重块A和B相叠放在水平面上,如图a所示。已知B块重W1=0.5kN,A块重W2=0.5kN,A块与B块间的摩擦因数为fs1=0.25,A块与水平面间的摩擦因数fs2=0.20,试求拉动A块所需的最小力P的值。【图片】
【单选题】病人,男性,36岁。尿蛋白(+++),全身水肿1个月,测血压165/100mmHg。入院后诊断为肾病综合征。引起该病人水肿的主要原因是
【单选题】最近、夫は大変忙しい。( )、こんなに大切な約束を忘れるなんてひどい。
【简答题】两重块A和B相叠放在水平面上,如图(a)所示.已知A块重P 1 =500N,B块重P 2 =200N;A块和B块间的摩擦因数为f S1 =0.25,B块和水平面间的摩擦因数为f S2 =0.20. 求拉动B块的最小水平力F的大小.若A块被一绳拉住,如图(b)所示,此最小水平力F之值应为多少?
【单选题】Why does the customer call Rose?
A.
Because he doesn’t know how to shave.
B.
Because he is not satisfied with TAF shaving foam.
C.
Because he is not sure about the procedure for using TAF shaving foam.
【单选题】两重块A和B相叠放在水平面上,如图a所示。已知B块重W1=0.5kN,A块重W2=0.5kN,A块与B块间的摩擦因数为fs1=0.25,A块与水平面间的摩擦因数fs2=0.20,试求拉动A块所需的最小力P的值。【图片】
【单选题】Why does Jack keep talking to Rose in the cold water?
A.
He wants to tell her in the last moment that he loves her.
B.
He knows that his life will end soon and he has a lot of words to tell Rose.
C.
He wants to keep her awake.