假设已经通过MySQLi扩展建立与数了据库的连接,连接对象是$mysqli。现在请写出代码:执行查询语句"SELECT * FROM student",然后输出查询结果的行数。 A: $result = $mysqli->query("SELECT * FROM student"); echo $mysqli->num_rows; B: $result = $mysqli->query("SELECT * FROM student"); echo $mysqli->$num_rows; C: $result = $mysqli->query("SELECT * FROM student"); echo $result->num_rows; D: $result = $mysqli->query("SELECT * FROM student"); echo $result->$num_rows;

如果下面try代码块没有发生异常，则控制台的输出为： A: y{ B: wFile("D:/f1.txt").createNewFile(); C: leInputStreamis=newFileInputStream("D:/f1.txt"); D: stem.out.println("result:"+(is.read()>384)); E: .close(); F: catch(Exceptione){} G: result:true H: result:false I: result:false和result:true两种结果都有可能 J: 以上结果都不正确。

Experts say this may be _____________ the warming climate. A: as a result B: in result C: a result of D: a result

阅读下面程序 A: result=""； B: result=null C: result=number1 D: result=number2

【单选题】下面 C代码的输出结果是()。int answer,result;answer=100;result=answer-10;printf( “The result is %d” , result+5); A. The result is 90 B. The result is 95 C. The result is 10 D. The result is 100

.Her heart was slightly damaged ______her long illness. A: as a result B: as a result of C: result in D: result from

______, the bad thing has been turned in to a good one. A: As a result B: In result C: As a result of D: Result from

以下代码执行的结果是：（ ）int i=2;int result = 0;switch (i) {case 1:result = result + i;case 2:result = result + i * 2;case 3:result = result + i * 3;}System.out.println(result); A: 0 B: 2 C: 4 D: 10

下面的方法，当输入为2的时候返回值是多少?（ ） public static int getValue(int i) { int result = 0; switch (i) { case 1: result = result + i; case 2: result = result + i * 2; case 3: result = result + i * 3; } return result; }

Encouraging people to buy more ______ higher production, employment and more wealth. A: result from B: result on C: result in D: result for