在IPv4向IPv6过渡期间，如果要使得两个IPv6结点可以通过现有的IPv4网络进

波形梁护栏的防撞性能是通过车辆与护栏的摩擦、车辆与地面的摩擦来吸收碰撞能量，与护栏的变形无关。（）

患者，女性，22岁，不洁食物后出现眼黄、尿黄、乏力、食欲减退，如考虑急性甲型肝炎的诊断，则其不洁食物应该在下列哪个时间段内才有流行病学意义

A．15天

B．30天

C．45天

D．3个月

E．6个月

某高层住宅楼与裙楼的地下结构相互连接，均采用筏板基础，基底埋深为室外地面下10.0m。主楼住宅楼基底平均压力p_k1=260kPa，裙楼基底平均压力P_k2=90kPa，土的重度为18kN/m3，地下水位埋深8.0m，住宅楼与裙楼长度方向均为50m，其余指标如图所示。试计算修正后住宅楼地基承载力特征值最接近下列哪个选项 （）

A．299kPa

B．307kPa

C．319kPa

D．410kPa

下列函数的功能是
fun(char *Da，char *b)
while((*b=*a)!='\0') a++；b++；

A) 将a所指字符串赋给b所指空间
B) 使指针b指向a所指字符串
C) 将a所指字符串和b所指字符串进行比较
D) 检查a和b所指字符串中是否有'\0'

A company, Chauncy Co., has an annual travel budget of $55,000. The accounting department estimates that transportation expenses Will increase 5 percent in the coming year, and nontransportation travel expenses will increase by 15 percent in the coming year. Last year, Chauncy Co. spent $19,500 on transportation-related expenses, and $35,000 on nontransportation travel expenses. If the annual travel budget does not increase this year, and if the accounting department’s estimates are correct, how far over the annual travel budget will expenses be this year ？（）

A. Expenses will not go over the budget.

B. $5O0

C. $4,225

D. $5,725

E. $60,725