流化床的实际操作速度显然应（）临界流化速度。A、大于 B、小于 C、相同 D、无关

具有IgEFc受体的细胞是（）

A.巨噬细胞

B.B细胞

C.嗜碱性粒细胞

D.树突状细胞

E.肥大细胞

UML-based tools are often used for J2EE/.NET application analysis and design，both because UML’s object orientation is ideal for the J2EE/.NET implementation (66) and because of the expanding scope and complexity of today’s enterprise endeavors． (67) the approaches diverge at the coding/implementation phase，a common Set of analysis and design techniques applies to both J2EEand.NET．

The use of a virtual machine (VM) architecture is also common to J2EE and .NET. Application development tools (68) intermediate-level code instead of platform-specific binary code, which means the VM interprets that code in real time or performs Just-In-Time (JIT) compilation; the Microsoft VM always runs JIT-compiled code. This VM-based model results in (69) -independent applications and is conducive to the late-binding technique that’s (70) to the OO approach.

（67）（）

A.Although

B.However

C.But

D.Thus

用吊斗运输时有何要求？

某小区6层民用住宅，地基土为厚层淤泥质粉质黏土，f_sk=80kPa，采用水泥土搅拌桩，f_cu=870kPa，77取0.45，单桩载荷试验R_a=256kN，a_w=10%，采用d=0.7m的双孔搅拌桩；A_P=0.71m²，基础面积A=228.04m²。按设计要求p=f_spk=152.2kPa，β取0.7。则置换率与下列（）项值接近。

A．31.6%

B．42.3%

C．48.7%

D．54.6%

发送电子邮件时，不可作为附件内容的是（）。

A、可执行文件

B、文件夹

C、压缩文件

D、图象文件