Nn受体主要位于A．神经节细胞B．心肌细胞C．血管平滑肌细胞D．骨骼肌细胞
Nn受体主要位于
A．神经节细胞
B．心肌细胞
C．血管平滑肌细胞
D．骨骼肌细胞
参考答案和解析
美卡拉明
相关考题：
Which statement adds a constraint that ensures the CUSTOMER_NAME column of the CUSTOMERS table holds a value?() A. ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;B. ALTER TABLE customers MODIFY CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;C. ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn NOT NULL;D. ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn IS NOT NULL;E. ALTER TABLE customers MODIFY name CONSTRAINT cust_name_nn NOT NULL;F. ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name NOT NULL;
对受体叙述正确的是（）A、α1受体主要位于突触前膜B、α2受体主要位于突触后膜及非突触部位C、血管平滑肌细胞有α1、α2共存现象D、β2受体主要分布在心肌及其他部位E、在脊髓，β受体比α受体更有生理学意义
单选题Which statement adds a constraint that ensures the CUSTOMER_NAME column of the CUSTOMERS table holds a value?（）AALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;BALTER TABLE customers MODIFY CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;CALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn NOT NULL;DALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn IS NOT NULL;EALTER TABLE customers MODIFY name CONSTRAINT cust_name_nn NOT NULL;FALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name NOT NULL;
单选题有以下程序：#includemain(){ char *s=120119110; int n0,n1,n2,nn,i; n0=n1=n2=nn=i=0; do { switch(s[i++]) { default:nn++; case '0':n0++; case '1':n1++; case '2':n2++; } }while(s[i]); printf(n0=%d,n1=%d,n2=%d,nn=%d,n0,n1,n2,nn);}程序的运行结果是（ ）。An0=3,n1=8,n2=9,nn=1Bn0=2,n1=5,n2=1,nn=1Cn0=2,n1=7,n2=10,nn=1Dn0=4,n1=8,n2=9,nn=1
单选题对受体叙述正确的是（）Aα1受体主要位于突触前膜Bα2受体主要位于突触后膜及非突触部位C血管平滑肌细胞有α1、α2共存现象Dβ2受体主要分布在心肌及其他部位E在脊髓，β受体比α受体更有生理学意义