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【简答题】
物联网的网络层中使用了大量的短距离通信协议,其中 IEEE 802.15 无线通信协议包括 、 、 等
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举一反三
【单选题】At which point of the PPF curve is efficient?
A.
inside the curve
B.
on the curve
C.
outside the curve
D.
behind the curve
【单选题】The market supply curve is:
A.
downward sloping and is flatter than an individual's supply curve.
B.
upward sloping and is flatter than an individual's supply curve.
C.
downward sloping and is steeper than an individual's supply curve.
D.
upward sloping and is steeper than an individual's supply curve.
【简答题】bike-sharing is convenient and idon ' t need to buy a bike for_ A.I B.my C. mine D.myself
【单选题】The demand curve of a monopolist is:
A.
is identical to the marginal cost curve.
B.
downward sloping and above the marginal revenue curve.
C.
downward sloping and below the marginal revenue curve.
D.
kinked because of recognized interdependence with other firms.
【单选题】以下与库函数strcpy(char*p1,char*p2)功能不等的程序段是( )。
A.
strcpy1(char *p1,char *p2) {while ((*p1++=*p2++)!='\0');}
B.
strcpy2(char *p1,char *p2) {while ((*p1=*p2)!='\0'){p1++;p2++;}}
C.
strcpy3(char *p1,char *p2) {while (*p1++=*p2++);}
D.
strcpy4(char *p1,char *p2) {while (*p2) *p1++=*p2++;}
【单选题】If you want to use a sharing bike, you must first _________.
A.
download an APP and pay for the trip
B.
have a smart phone and download an APP
C.
unlock the bike and download an APP
D.
find a nearest bike and borrow it from anyone
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