【单选题】下列关于SQL语言特点的说法不正确的是(
B.
SQL功能强大,实现了数据定义、数据操纵、数据控制等功能
C.
SQL语言简洁,只用少量的动词就实现了核心功能
D.
SQL语言是一门独立的语言,不能嵌入到其他高级语言所写的程序中
【单选题】液化石油气,是指在常温、常压下呈气相状态,加压后可液化的()类物质。
【单选题】The researcher's aim is to
A.
facilitate students' learning by stimulating an emotional response.
B.
use drama to teach science.
C.
develop students' knowledge and abilities through review.
D.
make it easier for students to understand some abstract concepts.
【判断题】黑色页岩与炭质页岩的外观相似,但炭质页岩染手,而黑色页岩不染手。()
【单选题】已知函数y=f(x)(x∈R)是奇函数,那么函数F(x)=xf(x)(x∈R)( )
【简答题】Literature review can provide us with the framework for our own work which includes methodological assumptions,data-collection techniques,key concepts (等等).
【单选题】为成年男性患者导尿时,导尿管插入尿道的深度为