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【单选题】
影响短波通信的关键因素有:大气噪声和( )A.
天气
B.
距离
C.
天电噪声
D.
电离层变化
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【单选题】The electron configuration of a neutral atom is 1s 2 2s 2 2p 6 3 s 2 3p 6 4 s 2 , t he element is
A.
K
B.
Ca
C.
Sc
D.
Mn
【单选题】What is the primary purpose of PepsiCo ’ s s ustainable a griculture s upport p olicy ?
A.
T o secure their supply chain into the future;
B.
To fulfill the company ’ s social responsibility;
C.
To gain good reputation for the company;
【单选题】In a singly linked list, a given node by a pointer q pointing is a successor(后继) of the node that is pointed by p pointer, if inserting a node s into p and q, then ( )need to be accomplished.
A.
s->next=q; p->next=s;
B.
p->next=s->next; s->next=p;
C.
q->next=s->next; s-next=p;
D.
p->next=s; s->next=q;
【单选题】The number of "Quayle in 96" buttons demanded on a certain university campus is given by D(p) = 100-p; where p is the price of buttons measured in pennies. The supply function is S(p) = p. The current...
A.
an increase of $5.50.
B.
an increase of $3.50.
C.
no change
D.
a decrease of $3.50.
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